Rough idle, intermittent check engine light, and intermittently won't start. 94 PAU.

[Dangerousjordan]

to add to what the long detailed title says.. i've been dealing with a rough idle consistently, my check engine light will sometimes come on when i start it and then the throttle delivery will be rough and delayed and jerky, and then all i have to do is turn it off and start it again, and then the light goes off. and every now and again it wont start, even after it was already warm and running, it will turn but not fire, and then after a bunch of tries it will usually start right up. however last night i killed my battery trying to get it to start and then the today it started right up. crazy. i would love and appreciate help. thanks very much.

Jordan

[maxwedge]

Get a scan done see what the code is. Post back.

[82Stang]

Originally Posted by Dangerousjordan

to add to what the long detailed title says.. i've been dealing with a rough idle consistently, my check engine light will sometimes come on when i start it and then the throttle delivery will be rough and delayed and jerky, and then all i have to do is turn it off and start it again, and then the light goes off. and every now and again it wont start, even after it was already warm and running, it will turn but not fire, and then after a bunch of tries it will usually start right up. however last night i killed my battery trying to get it to start and then the today it started right up. crazy. i would love and appreciate help. thanks very much.

Jordan

Does unplugging the MAF sensor/MAP sensor change anything? Or maybe ICM, ignition control module... A code would help.

[mrd2001]

Sounds like a possible ignition problem, Have you checked the plug wires and coil packs?

[Dangerousjordan]

thanks for the pointers, i think i'll try and get a scan here soon, how do i go about doing that? is there a way to get a code without taking it to a shop?

thanks guys


Jordan

[mrd2001]

You should have a OBD-1 in your 94 so you can retrieve the code by jumping A and B at your diagnostic port with a paper clip and count the flashes, that is your code. The first one should be one flash, delay and two quick flashes. That is telling you the car is in test mode, code 12. the next codes that you receive will be your trouble code. Once you have you code, google it and that should give you a path to follow. For vehicles 96 and newer most auto parts stores can scan them for you or if the car doesn't run, you can give them a secuirty deposit and they will let you take the scanner home.http://www.2carpros.com/trouble_code...mg/gm_obd1.jpg

[HotZ28]

Originally Posted by mrd2001

You should have a OBD-1 in your 94 so you can retrieve the code by jumping A and B at your diagnostic port with a paper clip and count the flashes, that is your code. The first one should be one flash, delay and two quick flashes. That is telling you the car is in test mode, code 12. the next codes that you receive will be your trouble code. Once you have you code, google it and that should give you a path to follow. For vehicles 96 and newer most auto parts stores can scan them for you or if the car doesn't run, you can give them a secuirty deposit and they will let you take the scanner home.http://www.2carpros.com/trouble_code...mg/gm_obd1.jpg

Sorry, but the 1994 PA has an OBDII terminal, so therefore no A & B is available in the "diagnostic port"! The procedure described will not work on an '94, the only way to retrieve codes, is with a scanner.