300zx ptu problems. Both are possible causes but PTU is more likely.

300zx ptu problems performance enhancements and Techical related. Then started idle hunting going from 900rpm to 1500rpm then to 600 rpm and so on. How bad is the hole ?. Assuming it is the PTU, your best cure is to buy a series 2 PTU (and wiring harness). Up to that point, there was no problem. Battery is <6mths old, and a charge would definately renew charge (i dont have a charger ) Scan thru EF/EC and EL sections of the service manual were vague regarding required voltage to run the ECU. Feb 21, 2006 · I recently purchased a 1990 300zx with 83,000 miles on it, and drove it from Houston, Texas, to Reno, Nevada, where the engine quit. :) Aug 17, 2007 · I have done all the tests that the FSM recommends for a code 21 on pages EFEC-92 and 93. After looking at the details on the cd, I went ahead and pulled the s1 off, assuming the other plug would match up. Any ideas? Aug 17, 2004 · I can't believe my series 2 PTU has gone faulty so looking at other things. Is there an easy way to test it all back to the ECU ? Also Is there a way to recognise a stock Auto model ECU from the ECU itself!? from the numbers? Thanks MattB Sep 6, 2012 · If somethings out of sight, it is forgotten. ) Checked fuses and connectors (had history of connector problem Mar 16, 2012 · I have installed new splitfire coils. Feb 15, 2002 · My Zed is unfortunately having problems at the moment. Jan 8, 2010 · The 1st PTU wire-in caused a separate problem (to the initial CAS plug issue) and in turn caused the fouled plugs and flat battery. So he will not replace it, Was wondering if anyone has had this problem, also The Nissan 300ZX (Z32) general community discussion forum Post Reply 5 posts • Page 1 of 1 Afrikaaner Posts: 27 Joined: Fri Sep 25, 2009 3:39 am Car: 1990 300zx NA May 22, 2017 · 300ZX (Z32) Forums - Z32 PTU 1990 wiring help - Hey guys Help my can runs rough as My subhaness on my PTU fell apart when moving it rewired it and not sure where these 4 wires go. These arent the same symptoms you have, but the PTU can be responsible for several types of problems. Is there an easy way to test it all back to the ECU ? Also Is there a way to recognise a stock Auto model ECU from the ECU itself!? from the numbers? Thanks MattB 93 na Crank no start Just replaced fuel pump and filter. K-zed Secret Squirrel Diode test best You can check PTU with 'diode test'mode on a multimeter. Now - two weeks ago, I drove it a couple hundred miles to one of our plants. If so. Is it possible to test it? What kind of problems would you have if you had a bad Power transistor unite, would the car idle rough, miss at high RPM, have a bad hesitation in full gas? Thank you bye. 00 = £156. 78K subscribers 56 LTG Fuse and smoking PTU Problem Ok I put a new motor in a 90 NA. I've check Nov 18, 2012 · This all sparked from someone having intermittent problems with spark and misfires and what have you, which I suggested was a ptu because thats what happened to me and the S1 are supposedly not as robust as the S2. This subreddit is for enthusiasts of the Nissan 300ZX Z31 and Z32 generations. I've tired wiggling the cables while the car Apr 23, 2003 · The problem sounds ptu AND connection related, after giving it all to sort a problem like this you often end up going round in circles curing problems and also causing them elsehwere at the same time. Initially for the past few months, occasionally on warm start up, it'll missfire/pop once or twice before it clears. The Nissan 300ZX (Z32) general community discussion forum Post Reply Search Advanced search 3 posts • Page 1 of 1 DadZun Posts: 249 Joined: Sat Jul 07, 2007 4:15 pm Car: 1991 JDM Z32 300ZX, 2+2, targa, twin turbo manual, 50k miles, red Aug 20, 2003 · Hi all, A quick question I hope. Now Im having PTU problems again and even though I know its a simple easy fixed problem I just cant take it anymore! I have reached the end of the line! WHAT TO DO ? KEEP IT OR SELL IT ? If you want it ill give you any info you want but bare in mind im not sure if i want to sell and if yes how much I want. There appears to be a good signal from the ECU, power at the PTU, a solid ground at the PTU, and the continuity and resistance tests for the PTU and coil appear to indicate that there is no fault with I bought a s2 ptu off another member, Which came with one plug. So here are the list of problems -car running rich. Still no spark. Where in the engine is this PTU thing so I can see if has a new one already or not?. Feb 2, 2002 · Sounds like it could be your PTU or an electrical problem, often cables and connectors are removed to allow access to the timing gear panel retaining screws. Oct 14, 2001 · Just took z to my local gararge parked it posted the key and left the pissing thing. That sure sounds like a PTU problem. He replaced 2 injectors, 2 coils, the fuel filter, spark plugs, and various other things. As suggested I ran the ECU diagnostic to look for code 21, this Did I just fix my misfire with just one part? 1990 Nissan 300zx Twin Turbo Build | PTU Replacement TNT GARAGE 5. This sub harness is very prone to problems with corrosion in the connections and can't be purchased individually from Nissan. Checked the voltage from the wires comming out of the ECU with the car running and here is the problem, the wire corresponding to cylinder 1 has a negative figure, around -20v. 5. My car starts perfectly at a cold start. First I thought it was an issue related with engine breathing,but after I changed the MAF and checked some p May 29, 2010 · I'm new to the forum and new to the 300zx. New serie 2 ptu and fuel pressure regulator and new stainless fuel filter (40 micron) I have a problem with misfire that starts at about 4000rpm at full throttle. Can someone explain what happens when the PTU is faulty. I installed the PTU and everything seemed to go well, until I took it for a long drive this morning. If the cables are loose or have been knocked about, it can cause you a few problems. Replaced the PTU and problem was gone. May 10, 2012 · Nissan 300ZX technical discussion forum: Maintenance, performance, installations, modifications, how-to's and troubleshooting. The good news is that the connection on the new style PTU is sealed, if the harness doesn't have corrosion in the wires eliminating the old style connection on the patch harness is the common way to rid yourself of these pesky problem. Runs like new. bypassing via soldering the PTU subharness directly to the engine harness. It won't start and there is no spark from any of the plugs. Only problem is my battery is reading 11. Before yesterday I had never soldered a wire in my life, so I purchased a soldering iron, a huge length of wire, and practiced. Code 21 ignition can also be a PTU problem indicating the first PTU was having trouble (assuming it was a Series 1 PTU) Feb 19, 2009 · Re: INFAMOUS FUEL INJECTOR PROBLEM (EZ-300zx) Post by valkyie » Thu Apr 30, 2009 5:44 am EZ, I am having the same problem with my 1990 NA as well. I arrived at sunrise and as I parked the car, I left the ok so im back at home now and finally got hold of a laptop to log ecutalk values with. it cranks over and Nov 20, 2010 · How to replace your Series 1 PTU with a Series 2 PTU (with pigtails) I thought I would put this up as I have been asked how to do the install, and as Z32 300zx owners have been relocating their PTUs for years…Nissan’s great, but putting an electrical component directly behind the radiator wasn’t the ideal location. It had a series one ptu but I figured I should get the series 2 ptu to avoid the situation again. The previous owner said it sat for 2 years before he got it. NOTE: An Adapter Harness may be required for earlier models that haven't undergone the PTU recall. Aug 12, 2006 · My Z is 1990 TT SWB Manual. If the PTU fails, it won't run so it doesn't really matter. My collar temp sens is brand new with a new harness so I doubt it\'ll be that but il look into that fuel pump controller a Sep 16, 2006 · 300ZX (Z32) Performance / Technical Discussions related to Turbo charging, Supercharging, Engine, ECU, exhaust, and etc. Mar 31, 2008 · Just to let everyone know, I am now the proud owner of a 1990 300zx TT SWB T-Top Black Jap Import (I'll get some photos uploaded when it's clean)BUT I've got a bit of a problem with the car blowing PTUs at the moment and I could do with a little help working out what the problem is. Would anyone(s) be able to shed some light relating to turbo failure symptoms. Feb 12, 2002 · It just suddenly starts badly missing and becomes undriveable in a few seconds and stalls. com One black Sep 11, 2002 · Does anybody know of a flow chart to help people who have broken down, don't know if a normal one would help, it's just that the z is lot more complicated than the normal car! Jun 3, 2007 · Re: 300zx idle problems (truth211) Post by Zwicked » Mon May 26, 2008 4:18 am Unless there is something mechanically wrong with the engine, the only other cause can be electrical. Il give that a try. Had no trouble with mine but friends car just misfires when trying to start, tried his module on my car and it did the same thing, contacted store where purchased them from and was told they have issues with some 300zx's shorting out the PTU. Firstly how do you get to the existing series 1 unit. What would be the symptoms of having a bad PTU. So i bought this 300zx to fix it up. I coated contacts with dialectic grease to prevent moisture ingress - PTU design and mounting orientation also helps. 00 including air costs & it,s all fantastic Jan 4, 2012 · I don't think I burnt out my PTU because I didn't miss a single ground but I can't figure out why she won't friggin spark. Try unplugging the ECU, CAS and PTU then look at the resistance change in the battery cables when you switc Feb 2, 2012 · I haven't had good luck with the coils on my car and the PTU's are not the best. It runs so rough it can hardly climb a hill sometime. Jul 24, 2009 · Hi guy I hope you can stop me hating my 300zx. 8 volts. Managed to get Oct 14, 2006 · EDIT: Just saw your other post re Code 21 that's PTU as replies have confirmed. (nissan flow Jun 8, 2003 · 10 Hi! I ran ECU diagnostic on my 300ZX TT and got code 21. Factory connectors under the hood are often brittle and broken leading to irritating drivability problems. Is its main and only function the distribution of the power to the individual coil pack? or does it influence more than just this? Just asking, as I have recently discovered the bottom connection quite corroded, and have May 8, 2002 · First off I was wondering if there was any known problems or recalls with the 300zx that might make me regret buying it. And ptu to firewall (to ecu) have also been done. May 2, 2007 · This might be irrelevant but, a few years ago I had the PTU symptoms. Would a faulty CAS make the car miss and hold back like there's intermitant sparks? Sometimes the car goes like a train for a second then it almost stalls and cuts out. I've been searching the forums about problem my Z picked up at weekend, and from what you all say it would seem to most likely be the PTU. All readings should be around the same 790 ohms or thereabouts from memory, except via earth pin. In most countries other than May 12, 2003 · Hi, Just want to say thank you very much for taking the time to do a search before asking a question. The car idles and starts just fine. Upon giving my idling engine a look I noticed that there was some steam coming from the front of the engine. Subject continuity test PTU Posted by Jiro on February 27, 2010 at 1:18 AM This message has been viewed 7828 times. Chris C, if you are going to get a new one I perhaps we could buy two if mine is the Verified all grounds were good, coils are getting 12V, ignition relay is working, no blown fuses, so I pulled the PTU and tested off harness using the V2 test procedure. I put a new PTU on it and it has ran all year with no issues. Probably already fouled em if you've been trying several times since yesterday Customer: i have a 1990 nissan 300zx z32 twin turbo auto, i have just finished rebuilding it and now it wont start, i have checked the ptu unit and the cas sensor to no avail, car has gas, spark, and air but no go i have recently installed a chipped ecu too, from a highly recommended professional, any ideas, is it the ecu or something else please help!! P. Just want to make sure its the ptu. Re: PTU Problem? Hmmm fuel pump controller; haven\'t thought about that one. So I went through the ignition system and fixed 3 major problem. Also what is the reliability like for this car, seeing as its a 1990, i need to know it won't die on me. What I would like to know is the specific symptoms associated with a Series 1 ptu failing so that I can isolate the problem (s). My harness being cut, my PTU being shorted Dec 20, 2010 · The intermittent problem you describe makes me think it's gotta be a wire or a connection that doesn't have a good contact so sometimes it moves electricity and sometimes it doesn't. Symptoms are cylinders Feb 27, 2021 · Sounds like ptu, when they break they work when cold and cut out completely when they warm up Had similar problems recently, disconnected both PTU plugs and could see the white corrosion on both sides. Not the fuel pump. Z1 also sells this connector and the components to build your own repair harness HERE. Show off your car, ask technical questions, buying advice, and more. Does this mean that the Power Transistor Unit is destroyed? How could I be 100% sure about this? May I use a voltmeterwhat values should there be. But if I run it for say 15mins+ switch off & start up again it turns over & won't fire unless I leave it for for a wee while & start i Oct 27, 2009 · i started her up and after like 10 seconds the motor died,and the ptu heated up abit-now it wont start anymore-can i try earthing the 2 black wires to the plenum?or is the unit toasted? Mar 17, 2015 · A bit ago now once cleaning all the connectors of the ptu etc. side is on the I1. ptu relocation makes the loom shorter without hiding the ptu) Im trying to clear up the bay by deleting things which arent necessary, rather than hiding things. Lastly, is maintenance and repair expensive on this car? Thanks for any help. But, I ended up finding out from another FSM that it shows mine bad. Plus stronger spark is always better. com One black Jul 25, 2008 · What battery voltage is needed for ECU operation? After a suspected PTU failure, I swapped in a working PTU as a positive control. Once this relocation is complete, the OEM Passenger-Side Timing Cover has four holes left unfilled. I took a 1990 in on a trade that has had a misfire/no power problem for quite some time. Checked cylinders for spark and noticed it would rather jump well over an inch then go through the spark plug (old spark plugs) And no spark on cylinder 5. PTU - no, all checks out and have tried another PTU but still the same problem, same cyl. The car is in the garage now where a mechanic is Sep 3, 2019 · My problem is that I have put the new harness which has the series two plugs and my ptu is the series 1, so iv cut the old plugs to shoulder on to the new harness. Not sure why it would have blown a hole in the zorst though :confused: . Once this Mar 15, 2009 · This problem disappeared once I re-engaged gear. Deffo sounds like the PTU to me, one of the most common problems on the 300zx. Top xddtxx727 Posts: 4 Joined: Fri Jun 26, 2015 1:41 pm Car: 1992 Nissan 300zx Apr 18, 2014 · So, I've found in the fsm the test for the ptu, but honestly I don't know if I'm doing it right. The CAS sends 2 different pulses to the ecu, if the injectors click and the cops fire the cas works. It sounds like the car is misfiring, then slowly slowly the car’s rpms decrease and the its turns off. In the meantime, have a google search on "300zx PTU" and it will show you that unfortunately the Series 1 PTU is often the cause of problems like the one you are having. -checked resistance of coil pack on dead My series1 PTU has resided there (as per pics in T/A) with vented centre panel for 3 years without problem. PTUs are well discussed on this thread but I have not been able to find specifics other than this one by heavytrevy: Oct 6, 2012 · I know you did a write up or had a the testing procedures,and with what the test said, it said the PTU was good. The fuel pressure is at just above 3 kg/cm2 at idle. My 1990 300zx wont start. If your car is equipped with the old style heat sink style you will need to update your connectors, the bracket and the hardware to install. But also locates items in a more ideal location for either ease of access or for protection away from heat, moisture, etc. 7 Ohm. Today, the revs started fluctuating a little bit before the engine died in traffic. I pulled the spark plug out and it wasn't firing. I dropped the new motor in and crank but no start. My main question being: Can turbos fail without giving any smoke through the exhaust, and typical tell-tell signs. Pull all the plugs with the spring clip (CAS, PTU, Injectors, MAF, AAC, FICD, Coolant Temp Sensor, Air Regulator) and make sure no connectors are corroded. Last week th car randomly died. SpanIchabod New Member OK so I finally got around to replacing my series 1 PTU for a series 2 (Thanks Glenn/zed280zx). Nissan 300ZX technical discussion forum: Maintenance, performance, installations, modifications, how-to's and troubleshooting. Does the series 2 unit mechanically fit to existing fixings. The new style PTU requires the sub harness to directly plug it in, unless you rewire it. My problem most likely lies around the connections? Quote 91TT Ignition module (PTU) problem I have gone through 3 in the past two days. Can anyone tell me how to rewire my loom to take the series 2 ptu. even after a min or two it's fine to switch off & start, fires up sweetly. Suggestions? (I will be going S2 PTU very soon, so I'm looking for further suggestions to test / 100% diagnose my current problem first) Cheers, MoulaZX Last edited: Jan 4, 2012 MoulaZX, Jan 4, 2012 #1 dodgy s1 ptu finally caught up with me. If you have the old one, Nissan should replace it for free, do some research on the forum, there's lots of threads about it and the symptoms of a bad one. Took it to a few different places & spent plenty of money replacing other stuff The PTU fails because internal connections are damaged, moving it off the engine may help longevity of a series 1 that hasnt failed but if it has already failed you will still get problems but maybe not as much. They are very similar symptoms to what Chris C is having whith his car. I would however like to hear about opportunities to simplify wiring etc, without hiding components (i. 4. If you are not good at or do not have those please do not attempt. Evry now and then the car will lose power know matter what the throtel posision is then cut out,after waiting a few minuets it will start and drive again maybe for miles or maybe for 10 yards Last week a new ignit Stufarny Stuart "Power Transistor Unit" (PTU) located on the front of the engine on the drivers side - mounted on the plastic timing belt cover. Sep 3, 2013 · Hey guys, As crazy as it sounds but my ptu has been getting wet. . Feb 4, 2011 · A faulty ptu can cause misfire issues but have you checked the maf, coils and injectors as well? Jul 8, 2024 · 300ZX (Z32) Performance / Technical - Ptu issues - My 93 z32 na was running bad and I found that the ptu was just dangling in the engine bay. So i changed it out with one of the working ones. As current will only flow one way, reverse probes to get a reading between input/output pins on the PTU and check 1 > 1, 2 > 2, etc. Im having a lot of problems with my car and i just cant ******* understand whats going on. May 22, 2017 · I'm sure this is quite a common problem experienced by lots of users and I apologise if there's threads I've missed. Aug 3, 2012 · Series 2 PTU install problems Discussion in ' Technical ' started by Blakes, Aug 3, 2012. Howdy all (again) for those that haven't read my previous posts about my poor PTU issues here is a summary and hopefully the final question/s on the Description Old style PTUs are known for going bad; causing all sorts of poor running conditions or even shutting down completely, these problems were so bad in fact that Nissan had a campaign to update them to the Version 2 style with an updated PTU and patch harness. Is it literally as simple as (for example) there should be continuity between the E1 and I1 points when the positive side or your multimeter is on E1 and the neg. Sep 3, 2002 · Dammit Zed!! Well I fitted the series 2 PTU I got from Courtesy a month ago - and today stuck in traffic on the M25(quite hot day) she stumbled, then lost power, wouldnt rev then died! (misses was not happy) Like my old PTU problem I waited 30 mins for everything to cool down, restarted and we we May 23, 2014 · Nissan 300ZX technical discussion forum: Maintenance, performance, installations, modifications, how-to's and troubleshooting. According to previous owner the injectors are brand new. e. Tryed my ptu on another zed and no problems after 30minutes of driving. The dealership puts the new PTU on the right timing cover, which is the same location as the old PTU. If you have the old version it could be causing misfiring and the cause of your problems I do need to get the adaptor for the PTU soldered to the existing connectors, as the join isn't great due to their age, so this could be the cause of the problem but I just wanted to list the other symptoms here to see if it could also be something else or if all symptoms could be caused by PTU issues. Have 2 that are black on the main loom and 2 on that are orange and black. could the coils be bad? New Z32 Power Transistor (PTU) sub harness. I was posting on a different 300zx and someone said he had a similar problem. If you have a multimeter: * Check the resistance between the middle and the left pin of the coil connector plug (looking from the side of the engine). 6 weeks later, the problem was back, so I presumed it wasn't the PTU (even though it had all the normal PTU symptoms). Both are possible causes but PTU is more likely. :` ( Mar 10, 2007 · Left my Z the other side of town as it just cut out on me and failed to restart. replaced coils, plugs, ptu, timing belt. I went out to my zed last night and it wouldnt start. The New Style Power Transistor Unit (PTU) replaces the older version PTU. The rest all read around 40v. Always pays to check the ECU diagnostics 1st so as to fix the primary problem first. (Series 2 Power Transistor Unit Adapter Harness) This sub harness was part of the recall on the earlier style PTUs and allows the new style updated PTU to be plugged into a earlier style EFI harness. Apr 20, 2004 · I have wee problem, my zed starts first time, with no probs whatsoever. Mar 3, 2007 · So i have a 1990 300zx and i just got off the phone with nissan and they said there are no recalls for my VIN. I tested the injectors and #5 is fried, so im guessing that's the problem on that cylinder. After a couple or minutes driving the rpms start bouncing and the car starts shaking. #6 is a little trickier. * Check for continuity between Apr 25, 2009 · PTU is power transfer unit, dont ask me what it does tho cos i dont know, all i do know is it sorted my problem out, only cost 25 quid and i swapped over myself in 5 mins number 5 This Mass Air Flow Sensor / Small Early Style Power Transistor Repair Harness replaces the faulty connection on your Mass Air Flow Sensor or the small 6 pin side of your Early Style PTU. Was running fine then started running on 5 for no reason. Took under a week to come & 20 minutes to fit $223. While this was nice and a really quick procedure (for warranty tech pay on their part), there was still an issue with these Jul 5, 2006 · Apparently the car was running fine before the PTU went. I got 23 mpg and used no oil nor lost any coolant on the trip. I was looking over everything and my kid brother says shoul Jul 21, 2008 · go to the techsection and type coilpack in the box,magic will happen The left pin of each coilpack plug is connected to the PTU, the middle to the ignition relay and the right to ground. I tried to start it a List of problems on my 1992 na 300zx Ok so I bought my one owner z at around 127k miles. And that should work out that way across all the pins on the ptu? Also, in reference to a multiple meter, what does Oct 15, 2007 · Got a problem with mates Zed and we are having trouble chasing why no 2 cylinder is not firing. (The starter has a habit of just grinding on its own sometimes but thats another story. The remove the old one and replace it with the new one. I intend to upgrade this to a series 2 anyway regardless of the conclusion of this thread/problem. It will be either a black box (Series 2 PTU) which is the newer version, or a silver box with ridges (Series 1 PTU) which is prone to malfuncion with age. I have series 2 connectors Oct 19, 2007 · im ganna do this on a friends car, as reccamended by Z1. While driving engine check light came I'd swap out the PTU first before digging around the ign switch. Cleaned all terminals with a needle file and scotch brite and sprayed them with CRC, plugged back in and as the clips that lock the plugs in were missing ran some lock wire around the clip groove to ensure a tight fit ,problem solved. <br>What happened when you disconnected the PTU and tried? You still blew the FL I assume. Left it idling while logging for half an hour then drove Jan 12, 2010 · Firing order is 1-2-3-4-5-6 That loop on the PTU wiring is for timing with an inductive timing light. So do you think a good way of testing this would be to leave the car running for a while, then turn it off, then turn it back on and it shouldn't turn back on since, that ptu is hot right? I'm thinking that the PTU just needs to be replaced I think. Oct 14, 2015 · The PTU is the Power transistor unit, it was a recall for the 1990 300zx models. (Car runs for 15 mins, stops, cools down - repeat at will !). Apr 19, 2004 · I was also wondering if its the PTU unit overheating or the heat from the engine affecting it? If its the first would covering the back face in heat transfer paste help? I'd swap out the PTU first before digging around the ign switch. Also wh Oct 28, 2009 · 300zx NOT STARTING, CRANK ANGLE SENSOR??? PTU???? Post by J3SWISS » Wed Oct 28, 2009 7:09 am Help, I have a 1990 300zx NA Auto, it has always had starting issues since I bought it, it would do bad on cold starts (would sound like it had the cam done) then after one minute it would be ok. You can /bypass eliminate ign Mar 7, 2002 · Guys, Had a lot of heartache with my ptu over the last 6 weeks or so, what with mechanics & begging lifts to work,took the advice of you lot & bought a upgrade PTU from Curtesy. I understand pre '92 models had an older version PTU which was prone to failing and was later Apr 23, 2010 · Nissan 300ZX technical discussion forum: Maintenance, performance, installations, modifications, how-to's and troubleshooting. You MUST stop cranking it over as you will foul the spark plugs and when you fix the PTU problem, the fouled plugs will be the new reason it won't start. If the PTU is going does it stop all sparks or miss on different cylinders? I think the Crank Angle Sensor tells it which plug to fire, am I right? May 15, 2015 · good. Here is the write up: Disclaimer: This procedure does require a plenum pull, soldering, wiring, time, and patience. You can /bypass eliminate ign Jan 4, 2012 · I don't think I burnt out my PTU because I didn't miss a single ground but I can't figure out why she won't friggin spark. Please email for picture jasnissan350z@hotmail. Apr 23, 2010 · Nissan 300ZX technical discussion forum: Maintenance, performance, installations, modifications, how-to's and troubleshooting. Jul 7, 2007 · Re: Tip for PTU problems (tmeyer29) Post by DadZun » Mon Sep 03, 2007 10:28 am tmeyer29 wrote: old news bro D'oh! Oh well, was news to me, lol! Can the PTU cause the symptoms I mentioned? Sporadic loss of cylinder? Done the injector clean, haven't done plugs - my mechanic is blaming the PTU so thought I should deal with that first. Before I started dailying it I did the 120k miles service and more; timing, water pump, clutch, rear main seal, you know all that. So im tank59 tank59 i recently installed the PTU upgrade on mine & a friends zeds. Z1 Motorsports PTU Relocation Kit for all '90+ 300zx models. Took it to a Nissan dealer & they put a new PTU in (but it was a Series 1 PTU - I didn't know any different at the time). The starter turns the engine over and over but it doesnt catch. I hooked it back up to the stock bracket but it still has a miss. To make things PTU failure I am having quite the same symptoms of your car (stumbling ,loss of power,bad acceleration). Nissan had a recall on the entire earlier model PTUs. Jul 2, 2008 · THANKS! i dont know about opening it up with a dremmel sounds to complicated to me:confused: i used the wiring harness that came with the original new ptu to try the replacement ptu:confused: and works ok so me smallish brain thinks its the original ptu that failed so am going to sticking with that for the time being (deep breath):tongue: dan. My Z will either be rolling and just shuts off or parked idling for around twenty minutes then it will just Nov 9, 2008 · Thanks for responding. I did a wiring diagram to take the confusion out of it Modified by Zwicked at 6:55 AM 1/14/2010 Jul 3, 2022 · Nissan 300ZX technical discussion forum: Maintenance, performance, installations, modifications, how-to's and troubleshooting. Suggestions? (I will be going S2 PTU very soon, so I'm looking for further suggestions to test / 100% diagnose my current problem first) Cheers, MoulaZX Last edited: Jan 4, 2012 MoulaZX, Jan 4, 2012 #1 Jul 5, 2009 · Evening All, As this week-end comes closer to the end. Zeo Active Member It happened all of a sudden last friday >>>> night. If only more people would do the same :D. just getting fed up with this. Oct 26, 2004 · Hope someone can reassure me here-- The car was running fine, then started to loose power and snap crackle and pop underneath as if the ignition had a problem. Turns out that my radiator hose has a tiny hole in it and probably from before has been spurting out water all over the ptu Jul 5, 2005 · i start the car every day no problems, i go maybe a mile or two and it will splutter and lose power, i pull over and start it a couple times and its still the same, then suddenly it will fire up and off it will go no problems and run all day, ive changed the ptu, and still the same, so would be g Feb 7, 2011 · I have purchased 2nd hand series 2 PTU + bracket with cut off loom. Oct 15, 2007 · Got a problem with mates Zed and we are having trouble chasing why no 2 cylinder is not firing. I changed the coil pack and it still no spark. May 22, 2017 · 300ZX (Z32) Forums - Z32 PTU 1990 wiring help - Hey guys Help my can runs rough as My subhaness on my PTU fell apart when moving it rewired it and not sure where these 4 wires go. In order to diagnose the problem the guys removed the plugs and leads. can you notice this by the way the turbo My 300zx decided to identify as a 1 cylinder v6. Been there, done that and still doing The power was cutting out on acceleration. Mar 15, 2009 · What I would like to know is the specific symptoms associated with a Series 1 ptu failing so that I can isolate the problem (s). We have changed the PTU and coil pack both with the same result, still nothing on no 2. i do still have the old style ptu and i dont know if i should be concerned or not. Thoughts: I currently still have a series 1 ptu. Had a half hearted look and looks like plenum hoses pipes must come off but how as they seem pretty rigid. This product was produced based on an enthusiast’s idea to use these left-over holes as a decoration opportunity Hi in this video i am doing a test to start the car and i wasn't getting any spark so i did a sub-harness ptu delete and it fix my no spark problem now i fou Ptu to coilpack plugs (new plugs) have been rewired. After asking a fair few people the general response is that the PTU could be on the brink of shitting itself, which seems logical as it is an 89 300zx which came with the series 1 PTU. ? Some tip where I should buy the PTU? Thanks10 11 Sep 11, 2002 · Does anybody know of a flow chart to help people who have broken down, don't know if a normal one would help, it's just that the z is lot more complicated than the normal car! Jun 3, 2007 · Re: 300zx idle problems (truth211) Post by Zwicked » Mon May 26, 2008 4:18 am Unless there is something mechanically wrong with the engine, the only other cause can be electrical. Message I just pulled my PTU out trying to diagnose one dead cylinder Problem: dead cylinder Other: smell of gas, rough idle Steps so far: -did balance test and isolated dead cylinder. I have been having this problem for a while and I am still trying to figure it out. :- ( Car was running, timing belt broke, pulled engine and repaired heads, upgraded the turbos, injectors, exhaust, and ECU. Dec 14, 2008 · I have a 1993 2+2, bought it one year ago, when I got the car, I knew it had a start problem. Dec 10, 2021 · Common problem, owing to its proximity in the engine bay making it susceptible to heat over time. Should be around 0. Being able to relocate a certain items in the engine bay not only frees up room in an already cramped area. S, the cas sensor was only removed Oct 22, 2016 · As above really, just curious as to the main function/functions of the PTU. This is a replacement New Power Transistor Unit which fits all '90+ 300ZX (Z32's) that have been updated with the PTU recall. Cylinders #5 and #6 aren't working. ECU does not throw any codes. Still the same problem The conversation revolves around a 300ZX car that won't start, with various suggestions and potential solutions Aug 13, 2003 · May have a cheap reliable source for Bardahl Octane Booster Says its world famouse on the can :rolleyes: Anyone have any experience of this particular brand? Anything I should check b4 I chuck this into the fuel tank? /\/\ark April 20, 200421 yr 1 reply PTU Problems Sep 6, 2012 · If somethings out of sight, it is forgotten. I thought it was the classic PTU problem, but that doesnt seem to be the problem. Bad PTU = no spark on one or more channels, If you're getting spark at all 6 then the PTU is fine. The very nice man from the AA rubbed his chin and said it was something to do with the ignition. For anyone who has ever owned, driven, built, raced or admired the 300ZX. ieaql lzup rrmsfej dan ptdb ehtu eiwo aimtt iklasr nfc fluue euxws tpi bqw wfpzvs