Too many Damn problems

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Originally Posted by Slick2500

This statement is only partly true. 97-00 don't need a rear o2 sensor, 01+ need an o2 sensor or the cat diagnostic test gets stuck on and the car will dump fuel. http://www.grandprixforums.net/threa...ou-should-know

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Guess that's what I get for having four W-bodies, the newest of which is 2000. :D

The main reason I know that is because I have an 01 and it didn't have a cat when I got it.

Sent from A Galaxy Far Far Away........

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Originally Posted by Slick2500

The main reason I know that is because I have an 01 and it didn't have a cat when I got it.

Sent from A Galaxy Far Far Away........

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But thats only if the rear 02 is faulty or unplugged right, if you just dont have a cat it would just throw the code correct? No bad MPGs or anything.

Sent from the Milky Way

If the downstream o2 sensor is throwing a CEL, then you car is dumping fuel most likely. I could be wrong though.........

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Originally Posted by Joey DaRatt

If the downstream o2 sensor is throwing a CEL, then you car is dumping fuel most likely. I could be wrong though.........

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Mine was def dumping fuel not a doubt. I experimented cause I cleaned my exhaust tip. Ran with a code. Finally got it fouled and cleaned it again and still looks clean rather than black

Hopefully come Sunday I won't have to worry about it anymore.......