Hi, I just bought a 2000 GTP about a month ago and I'm having some issues with it.
Background info: Car is completely stock, 80,100 miles.
So occasionally when I start it, it runs really rough for about 30 seconds, with the rpm's going from 800-1100. Giving it some gas clears it up pretty quickly. Almost sounds like one of the cylinders isn't firing at first, and it eventually starts firing. Runs perfect after 30 seconds.
No CEL's are thrown after it does this issue. I occasionally do get a P0137 code for the rear o2 sensor, but only when I go WOT up to 70-80 or so.
Also, when in gear at a stop light, if i release the brakes a tiny bit, it feels like the car is jumping a little, and I can feel the same issue accelerating from a dead stop at low speeds.
Transmission shifts perfect however, and the fluid looks good, so I'm assuming that it's an engine issue.
I'd appreciate any help with this, I've done lots of searches and can never find my specific issue.
Thanks!