Jump to content
HybridZ
Heroez

Help! 280zx turbo is sick

Recommended Posts

Heroez    1

Give me a call tomorrow I and will tell you exactly where every wire for the AFM goes. I am picking up my Turbo 82 280zx tomorrow and will be happy to help you out.

Thanks man. My boss was rushing me friday, so I couldnt look up that paint code. Monday I am showing up early to get time to look it up.

Share this post


Link to post
Share on other sites
Heroez    1

Hadnt heard about it. Its a possibility. I have an update- You cant use the FSM to test the AFM. Me and a few other people ran tests just like the manual says. We tested unknown and known good turbo AFMs. They all fail test 1, and the component test. They also fail the flap movement tests. It turns out the only accurate way to test them is with power supplied. Im leaning towards saying the only way to test them is to load test them. So my AFM may not be bad afterall. The problem is somewhere else. Im about to give up.

Share this post


Link to post
Share on other sites

Have you tried a different ECU? I know you had yours rebuilt, but something could still be fried. I have a one that I removed in order to swap in the z31 ECU. You are welcome to it. It's known good. If it doesn't fix your problem, I'd appreciate it back though ;P

Edited by Swervey McZCar

Share this post


Link to post
Share on other sites
Heroez    1

Have you tried rebuilding the AFM? Basically you move the wiper to an unused portion of the carbon track and you should be good for another 30 years ;)

 

Did you test the AFM at it's connector or through the harness?

I did move the carbon trace board a few times with no change in how the car runs. I bought a replacement used AFM which the seller swears its good because he drove with it, still no change in how the car acts. Yes, the FSM has you test the wire terminals on the ecu connector, then the part itself. The test is useless though. Even known good AFMs fail testing this way. The test result between the wire terminals and the part were identicle so the wires there seem fine.

Edited by Heroez

Share this post


Link to post
Share on other sites
Heroez    1

Have you tried a different ECU? I know you had yours rebuilt, but something could still be fried. I have a one that I removed in order to swap in the z31 ECU. You are welcome to it. It's known good. If it doesn't fix your problem, I'd appreciate it back though ;P

I do suspect my ECU. Nobody around here has one to use. I will PM you.

Share this post


Link to post
Share on other sites
Heroez    1

Still no progress. I recieved the ECU and did some research on the different turbo ECUs. The bad news is, a 1981 turbo ECU lacks the dropping resistors for the fuel injectors. In that year they used a resistor pack on the inner fender of the engine bay. In my 1983, they are built into the ECU. At this point I dont want to start changing any wiring. Im staying in focus, trying to find the faulty part. I didnt want to have the car undriveable, and that is why this lending of an ECU was a major help. So I need some opinions on what to do now. Any thoughts or advice?

Edited by Heroez

Share this post


Link to post
Share on other sites

That ECU came out of an '83 turbo with low impedence injectors. I used it with no resistor pack and the 1983 harness. I wrote "1981.5" on that ECU in sharpee marker after looking the number up on Jim Wolf's website. I should have written a question mark after it because I'm not very confident in that information. Please post the part # here so we could look it up for you, but I ran that ECU on a 83 engine and harness for several years. It was installed in the 83 parts car when I got it.

Edited by Swervey McZCar

Share this post


Link to post
Share on other sites
VinhZXT    16

This is my ECU. Sorry about the blurry pictures.

Myecu.jpg

 

I just read thru most of your posts and I think it worth a try to look at the EGR valve. Do you still have the vacumm like connected to the EGR valve? Just disconnect it and test it out. The ECU connector would be the next guess on my list. GL

Share this post


Link to post
Share on other sites
Heroez    1

Ok. I will try removing the line to the EGR and plug it so its not a leak. Go for a test drive, see what happens. I will report the results for you. Thanks for reading and giving a suggestion. I may not have mentioned that the car and engine is very clean and well taken car of. Right now I have to install the AFM that I had out for testing. That goes pretty quick. Can someone please post a pic or describe in detail how the AFM ground wire should be attached? I have one I made, just unsure where it goes.

Share this post


Link to post
Share on other sites

×