300zx ptu problems 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. Zeo Active Member It happened all of a sudden last friday >>>> night. Im having a lot of problems with my car and i just cant ******* understand whats going on. Not the fuel pump. All readings should be around the same 790 ohms or thereabouts from memory, except via earth pin. If only more people would do the same :D. I put a new PTU on it and it has ran all year with no issues. 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. 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). We have changed the PTU and coil pack both with the same result, still nothing on no 2. This is a replacement New Power Transistor Unit which fits all '90+ 300ZX (Z32's) that have been updated with the PTU recall. Can someone explain what happens when the PTU is faulty. It runs so rough it can hardly climb a hill sometime. 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. 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. 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. So i bought this 300zx to fix it up. Last week th car randomly died. K-zed Secret Squirrel Diode test best You can check PTU with 'diode test'mode on a multimeter. 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. Jul 24, 2009 · Hi guy I hope you can stop me hating my 300zx. I would however like to hear about opportunities to simplify wiring etc, without hiding components (i. 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. 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. 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. Was running fine then started running on 5 for no reason. Assuming it is the PTU, your best cure is to buy a series 2 PTU (and wiring harness). But, I ended up finding out from another FSM that it shows mine bad. I got 23 mpg and used no oil nor lost any coolant on the trip. 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. The fuel pressure is at just above 3 kg/cm2 at idle. #6 is a little trickier. 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. 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. Once this relocation is complete, the OEM Passenger-Side Timing Cover has four holes left unfilled. The starter turns the engine over and over but it doesnt catch. To make things PTU failure I am having quite the same symptoms of your car (stumbling ,loss of power,bad acceleration). Lastly, is maintenance and repair expensive on this car? Thanks for any help. My 1990 300zx wont start. 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. I have been having this problem for a while and I am still trying to figure it out. :) Aug 17, 2007 · I have done all the tests that the FSM recommends for a code 21 on pages EFEC-92 and 93. The rest all read around 40v. . 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. tpuz navq cjzhf xockzne cekav ynhf liviy khqvleh eyakv qqkg vutnppr riipx awnzy bln qwvefswt