1994 bonn. 3800. idiking at 2500 rpms, engine codes= p1640 1650 1670.

pleasw help

As I mentioned on the PM to you, Todd. Those are all PCM fault codes. First thing I would try is disconnect both battery cables, clean well, and reattach. This will also give the PCM time to reset, if it is going to.

Check your throttle body and clean it, check the throttle position sensor, check the idle air control. make sure they are working and clean.

i have done all the above mentioned except for cleaning the throtle body, ill try that next. thanks for any sugestions

Are you sure on those codes? Those look like OBD2 codes. You have a OBD1 car,

Todd, I just noticed, you provided trouble codes for OBD2. The 94 Bonneville has OBD1. Who gave you those?? They couldn't possibly come up on a '94.

EDIT: Dan beat me to it. LOL

definatly a obd2 my buddy is a mech. and i watched him hook up a (modis?) scanner that cost 9000$ (so he says)and those were the only codes showing, i wrote them down. he suggested that for those 3 codes that it was probaly a bad computer or a wiring problem. i trust him and he is very good but he does not specialize in bonnevilles so i figured i would try you guys being that this is you specialty.

That look to be OBD2 codes and those are in a 96+ car. Is it possible the engine was changed?

definatly a obd2 i dont know what that banana is there for. lol

I checked again, and they are actually 2000+ codes.

1640 Output Driver Module (ODM) Circuit 1 Error
1650 Output Driver Module (ODM) Circuit 2 Error
1670 Output Driver Module (ODM) Circuit 4 Error