racerxxx98

I'm really hope someone can help me with this problem. I have a 2000 gt with a just a k&n filter, 70mm tb, plenum, mangnaflow exhaust, and 410 gear out back. I keep getting a P300 and P302 code. I have took the car to a shop twice now and have replaced the coil pack for cyl 2, all 8 spark plugs, cam pos sensor and still i'm throwing these codes. I have a code reader so i can delete the codes but they come back shortly after. Now i've looked all over the net and all i've found are people who have these problems but their cars are misfiring and stutter all over the place. My car runs fine now i wouldnt normally be concerned but i have a driving trip comming up and i really don't want the stress of worrying if my car is going to die on my 500 miles away from home. Does anybody have any idea what is going on with my car?

cliffyk

Here's what the shop manual says about P0300...

The EGR system issues are the only that you do not mention having investigated.

Here's a link to the description of the misfire monitor's operation, from the 2000 MY shop manual.

I recently experienced random type A misfires, at light loads and lower rpms, disabling the EGR in the tune fixed it up. We have no emissions testing here in Florida so I think I'll just leave it that way and maybe physically delete it all when the weather cools off...