I have gone over the wiring and everything seems to be fine. Is there some way for me to check for cels? I have a chipped p28. The motor is idleing at 1,000-1,100 rpm and keeps pulsating between 1,000 and 1,100 after it warms up. It runs fine when it starts but it still idles at 1,000 when I start it. Is this a timing issue???? When I hit the gas there is lag before it decides to accelerate and when it does it sounds bubbly and one time it backfired. Any ideas would be great. THanks.