To put my level of frustration into perspective, I want to go out and kick a dent into every body panel in my car and drive it off a cliff. Here is this link that I was reading and this guy is having the exact same issues that I am having. http://www.grandprixforums.net/losin...oad-49670.html I messaged him and he said that he gutted his cat and it fixed his problem. The problem with that compared to mine is that I don't have cat. I have headers with catless dp. I just replaced the front O2 today and bought an extension harness instead of my at home harness extension and an O2 sim hoping this was the issue. 150ish dollars later and no progress. I have had the car for less then a year and drive it daily to work 6 miles and maybe put 1000 miles on it. Since I've had the car I have:
Fuel pump was recently replaced just before I bought the car.
Missfire- replaced plug
Fixed a missfire on cylinder 4- bad coil
Right after that had random missfires- bad plug wire, bad maf, bad map
Replaced all the vac lines
Just after fixing the random missfires, I put on a ported throttle body and ran good for a few days then had this issue. I put the stocker back on with the screen and fixed it a lil bit. Recently I drove it on a 3 hour round trip with the sc belt off and it slowly worked this bug out. It was pulling hills good and cruising at 85 with no problems. After I got back I put the belt back on and low and behold the beast is alive again. It ran good for a couple weeks and I did a diy tps adjustable mod. It ran fine for a couple days after that and now the same issue is back, I have to creep the throttle to get it to 35 because any more it just bogs and chugs. Getting it to 55 is even more of a problem. When its cold it runs fine till it warms up. The guy I messaged with the thread pointed me towards the crank position sensor. Also my tach needle bounces when the key is on before starting, and my mpgs are at 14. Oh and I re gapped my plugs before the 3 hour trip to .550 from .600. ANY HELP IS WELCOME!!!
