[rbuswell]

Originally Posted by thomasryan

I would look at the wiper tracks on the afm. you can file the mounting holes and slide the board over a little.

at your elevation, your fuel trim should be in the negative teens. try to run it to the low fuel light and tank up with the next higher grade.

does it flat spot when the engine is cold? if not I would look at the emission stuff and its operation.

1. I'm frankly kind of chicken to drive it for long distances until I solve this. I'd say my longest drive was about 40 miles round trip. The flat spot is immediate upon starting and driving. It doesn't seem to go away after being fully warmed up on my few longer drives either.
2. I don't own a tool for reading trim. Any recommendations?
3. Can you elaborate what wiper tracks are? Sorry for my ignorance.
4. In Colorado there is only one grade higher fuel which is 89 octane. All Colorado fuel is also pretty high in ethanol. Nearly full tank but I can drain it and put it in one of two other cars that use 87. There are also octane boosters I can add.