Code P0300

nrod · Post by **nrod** » Mon Jul 02, 2007 7:01 pm

I just recently got headers with dual 3 inch exhaust borla with no cats. The spark plugs were changed out using oridiums and the 02 sensors were extended. I have a 2000 trans am ws6 auto. The problems that occured after installation is the 2 02 sensors rear made 2 separate codes and also a p0300 multiple cylinder misfire. I bought the slp diablo sport predator from summit racing. It had an option to disable the 02 sensors which it did. SO i erased all three codes off my car and ran it. It misses and backfires and also runs slower than before. I really have no clue on what to do to make the misfire turn off and make my car run right.

Post by **mikel** » Tue Jul 03, 2007 12:02 pm

The P0300 is not related to the O2 sensors, and is likely being caused by something else.
Something I see alot of is after headers are installed is that a plug gets broken or a wire is burned causing these types of issues.

Thanks

nrod · Post by **nrod** » Tue Jul 03, 2007 2:13 pm

so i dont need to adjust the fuel or what about turning off the o2 sensors. i have not cats do i just need to put them back on. I took my car to a tune/muffler place do you think they will be able to find the problem or could it just be a tune.

Post by **mikel** » Tue Jul 03, 2007 2:38 pm

This does not sound like a tune related issue...what happens after you reinstall the stock tune?

Code P0300

Code P0300

Fuel lean or rich

RE: Fuel lean or rich