Im having a lean surge at about 3000 rpm, at 100kpa with very light throttle at cruising speeds(highway) at idle it runs fine and in boost it runs fine. Tfi is brand new. Has a working msd 6al. Walbro255, Stock fpr. Please help
If this is a PiMP ECU related question then post it in the PiMP or PiMPx section (depending on which one it is) and include a datalog of the problem and a copy of your tune. That way we can tell you for sure why it's got a lean surge. Without those files we can only guess.