way too rich!

[Jeff_in_Atl]

Do you actually see fuel, or are you seeing the water in the exhaust that normally condenses out in colder weather?

No. The O2 sensor can only sense oxygen. It can not sense fuel. With a misfire, you get raw fuel and air in the exhaust pipe. The O2 sensor "sees" the air/oxygen, figures its running lean, and richens the mixture up with fuel the engine does not need. Misfires and exhaust leaks can cause a "false lean" condition, and cause the engine to run excessively rich.

You can often detect these problems by using a scanner to look at the long term fuel corrections (aka "BLM"s). That will help determine the cause of it running rich. But first you need to verify its running rich, and that takes a multi-gas exhaust analyzer. An O2 sensor may pick up the rich condition, if you truely have a rich mixture, but if the exhaust contains any excess air from misfires or exhaust leaks, it screws the whole system up.

I stand corrected but I thought since he had an OBDII that it would detect a misfire and flash the SES light and since he didn't say that I didn't think it would be that. I'm still learning.

But you are right in that step one is always get it scanned. Most auto parts stores will scan an OBDII for free. Don't take it to the dealership until you go get it scanned for free.

[jerrysta]

It's a 93 so isn't it ODBI?

Or was that only the v8's that switched mid 90's?

[Christopherrr]

It's a 93 so isn't it ODBI?

Or was that only the v8's that switched mid 90's?

I believe all f-bodies got the swtich to OBDII in 97'.

[Dave M]

The switch was made to all OBD II in '96. Some '95's (california cars I believe) received it. Other '95s had OBD I but an OBD II diagnostic port, which can really screw things up.

[Jeff_in_Atl]

The switch was made to all OBD II in '96. Some '95's (california cars I believe) received it. Other '95s had OBD I but an OBD II diagnostic port, which can really screw things up.

Wasn't the V6 OBDII in 95?

[smitty]

this is a 93' 60 degree v6 with obd1 engine management. obd2 came in 96 but they changed the engine to a 3.8l 90degree v6. obd1 had it where you could jump out a and b on the terminal to find codes and the check engine light would flash the code. when i do that to mine the only thing that happens is the rad. fan kicks on.. the car idles fine its just when i press the gas it sounds like its missing.

[Injuneer]

A couple of clarifications.... there were NO, repeat NO 1995 OBD-II V8 F-Bodys. All CA emissons A4's had dual cats. But they were not OBD-II. The people who program these cars and write the software to program these cars have never found a 1995 with OBD-II.

Some OBD-I ECM's can be scanned by shorting the pins, but the 1994/95 OBD-I V8 F-Bodys can not be scanned in that manner.