quick OBD related question...

alright i have a 1995 riviera, with a 1997 motor in it...so does this still mean i have an OBD I or is it a II since its post 1995?

I would assume you had to swap electronics over along with the 97 engine, correct? If so, you should be OBD II.

What he said. It has nothing to do with the engine, everything to do with the PCM.

Can you take a picture of your PCM?

Depending on how much detail and wiring swapping happened, your S2 motor could be running on either.

BillBoost37 wrote:

Can you take a picture of your PCM?

Depending on how much detail and wiring swapping happened, your S2 motor could be running on either.

shit i could..if i knew where it was! lmao ive probably seen it, but never knew what i was looking at though. i dont get into the electronics on the car, uinless its changing a light lol

The PCM is behind your glove box. Disassemble your glove box and it should be right behind it. It took me 10 minutes to get a 1997 Riv's pcm out.

oh ok. i went to autozone to do a diagnostic scan today and the lady found a port under the steering wheel side of the dash and hooked the scanner up but i was saying unable to read and she said it might be a bad connection from the computer/harness or whatever. ill get the pictures on here tomorrow of waht she was hooking it up to

That depends - if AZ was trying to use an OBD II scanner for an OBD I PCM, it's not going to work.

Well that's your data port to hook up a scanner, or tuning tool if you had one.

Did you tell her you had a 97 engine in the car, or just that the car is a 95?

If she couldn't read it, you are running a 95 pcm.

Bill, wouldn't they have both OBD I and II scanners? We need to know what he told them he was running, a 95 car, or a 97 engine. Garbage in, garbage out. Holy crap, I learned that phrase in the early 80's...

1998 Riv wrote:

Well that's your data port to hook up a scanner, or tuning tool if you had one.

Did you tell her you had a 97 engine in the car, or just that the car is a 95?

yeah that was the first thing i told her, that i was wondering since the motor was swapped would it make it an OBD II but my original motor was the 95 Series II but was OBD I. when she plugged it in, the scanner wouldnt allow it to read the computer. she said that either its a bad connection or something with the computer from the new motor not matching up or wasnt replaced. is swapping out to a newer pcm easy to do?

No, it's not easy. A newer PCM is also made to control a different transmission. I don't know what trans is in the '95s.

When you swapped engines, did you replace all the sensors?

1998 Riv wrote:

Bill, wouldn't they have both OBD I and II scanners? We need to know what he told them he was running, a 95 car, or a 97 engine. Garbage in, garbage out. Holy crap, I learned that phrase in the early 80's...

Nah, most only have OBD2 scanners because there are fewer and fewer OBD1 cars on the road. In addition it took a certain scanner to read the OBD1 stream on the OBD2 connect. Which is most likely why it wouldn't communicate.

deekster_caddy wrote:

No, it's not easy. A newer PCM is also made to control a different transmission. I don't know what trans is in the '95s.

When you swapped engines, did you replace all the sensors?

no we used the original wiring harness. only sensors ive replaced so far are the sensors on the throttle body, and i changed out the fuel injectors since the dummy who put it in used the injectors from the old motor on the new engine and made it sluggish. ever since then, and changing the sensors out, its been fast, but i wanted to know why the SES light is on...possible O2 sensor or something hopefully but my dash cluster where the PRND12 blinks four times when i put it in drive and i dont know what that code is

Was your car originally SC? Is the new motor SC?

no both were regular series II motors...however not everything was right because when i changed the exhaust donut gasket they typed in 1995 3.8 and gave me a 2'' gasket and my pipe was 2 1/2 so maybe there is something else going on...

My 95PA has a SeriesII engine and the code readers at Autozone wont work...

Bert

i hope its the type of scanners they use and not something that i neglected. when i head back to the junyard im going to snatch that pcm/ecm whatever it is out if its easily accesible

NA?

they have both there but i have a NA SII