I would like any suggestions on a problem car I have in the shop. Its an 87 T-type; TE61 turbo, 50# injectors, Impala SS MAF with translator and TT chip. The car had this issue before the MAF and chip. It idles fine for a while with the AF hovering around 13.5-14.0. I tip in the throttle, and it jerks and bucks (even with no load) and the AF shoots to over 19:1. I know the lean condition is causing it, but why? Fuel press baseline is 45 psi. At 10 pounds of boost, its at 55 psi. The car will set no codes at all, and on my scanner, everything looks normal. Of course, when the engine goes lean, the O2 voltage drops, but I expect that.
The owner says the car ran perfect before he installed the turbo and injectors. Injector duty cycle at WOT is at 70-75%.
Any thoughts?
The owner says the car ran perfect before he installed the turbo and injectors. Injector duty cycle at WOT is at 70-75%.
Any thoughts?