Noah's95z28

iTrader: (7)

OK I have a 95 Z and put a 96 LT1 in out of a caprice. On the passenger side where the O2 wiring is theres a ground wire that is supposedly the ground for the PCM. I accidently hooked this up to the starter when I put the new motor in because thats where it looked like it came from. After a day of trouble shooting I figured this out but couldnt see where it grounds to. I just ground it to 1 of the oil pan bolts. Now my SES light is on and my diagnostic port inside the car doesnt read anything out to the scanner. The car runs fine but the fans are on all the time because of the SES light and I cant read the codes if there are any. I checked the PCM fuse its fine. Im all out of ideas let me know what you think. Does the PCM need reflashed or is it shot?

ss.slp.ls1

iTrader: (36)

Strange. I was going to say maybe your PCM is fried, or your PCM fuse is blown, but if your car is running, then neither can be the case. Wish I had more ideas. Bump for you.

Noah's95z28

iTrader: (7)

Thanks, Car runs really good actually. I didnt know maybe there was a default limp mode built into the PCM?? Prob not but im all out of ideas.

shbox

Are you using the correct scanner and cable for it? Did you swap computers or leave the original one in there?

Noah's95z28

iTrader: (7)

I went to autozone and they used there tester. The guy tried it on his car to make sure it worked and it did. Its the same comp that originaly came with the Z.

flyinZ

iTrader: (15)

Make sure your getting power to the ALDL port. I had the same thing happen to mine, and a wire had come loose, between the port and the PCM. Just a thought.

96capricemgr

iTrader: (1)

Parts stores often screwup scanning the 94-5 cars. They try and use the scanners that flash the CEL but those wont work. More often than not these complaints endup being noting wrong with the car just the scanning technique.

Also if you used the Camaro wiring and pcm there is absolutely no reason to mention the Caprice thing. That will just lead ignorant people to focus on that detail rather than something meaningful. It is the same engine, of far more concern would be the knock sensors are different 95-96, which did you use? That is not this problem though.

shbox

That's your problem. They don't scan OBD-I (like your car is). They were trying to use an OBD-II scanner because the plug fit. Get the right scanner and cable and you won't have an issue.

Noah's95z28

iTrader: (7)

Thanks Guys, I will go back to autozone and make sure they use the right one. If that doesnt work I will start looking into the wiring.

shbox

Don't bother. They won't/don't scan OBD-I.

Noah's95z28

iTrader: (7)

Is thee a good cheap OBD-I Scanner on the market? Ive looked at some new ones on ebay but its hard to tell if they are any good.

RamAir95TA

iTrader: (2)

Freescan or Datamaster, plus your own cable.

Noah's95z28

iTrader: (7)

My plug in is a 16 prong is that the same as the OBD-II cars?

shbox

It is the same shape, yes.

DAVE00

iTrader: (10)

As suggested they will not/cannot scan OBD-I and if you plan on keeping your car for a while it'd be best to get your own cable and scan it yourself. Use TTS - Datamaster to scan it/log it and email Andrew at AKM cables and get a cable from him. Great guy and service on the par with Lloyd Elliott - EXCELLENT!!!!

Noah's95z28

iTrader: (7)

Update if anybody cares. It was a fuse but they are miss labeled and so the fuse I thought it was, was for something else. It works now and now im trying to fix the code. Thanks for the help guys.Laters

flyinZ

iTrader: (15)

Glad to hear!