Hello,
I have a 1986 GN 34k on engine 25k on tranny. ATR Stage 3A turbo, ATR pitbull chip, ATR ram air, 2.25" stainless crossover, 2.5" stainless downpipe, hollowed cat, 2.5" Hooker exhaust, "237" fuel pressure regulator, 40 lb injectors, high flow fuel pump, high flow oil pump, new timing chain, 3.5" MAF tube and probably some others that I have forgotten. Anyways I solved my high cold idle problems by resetting the TPS and IAC per the info on the sight. Now I am having a high rpm stumble that is really bothering me. If you get on it pretty hard it accelerates like crazy but you can feel the stumble until you take ur foot out of it. My ideas are lack of fuel do to clogged fuel filter, bad plugs and wires, overboost?? ANy help would be appreciated. Sorry but I dont have a scan tool and I also have no codes.
You might want to turn the boost down and see what happens. What is your fuel press. when you floor it? The pitbull chips are very aggresive.
Frank