Hello all. I have a 2000 manual with a built motor and a turbo setup. The built motor only has about 3,000 miles on it. I've been experiencing a problem with stutter and bouncing RPMs lately. There are no issues at idle, but while steadily driving anywhere from 25-45 mph, and mostly in any gear, at around 2800-3000 RPMs, the needle will steadily bounce up and down throughout a 200-300RPM range and the car stutters while doing so. Anything over 3000, there is ZERO issue. Just to rule them out, the IACV is a converted 2-wire (for OBDI compatibility), the fuel pump is new (a Walbro 255), new ID 1000cc injectors, wires, plugs and a boat load of other performance parts. I've read a few posts online that point to a distributor issue. Can anyone shed some light on this as to a starting point to diagnose or is this a common problem any of you have experienced?
