I have a 1992 LT1 Crate engine that I put a Painless wiring harness on and I can't get it to idle. The only modification from stock is a Crane 227 cam. It starts fine but idles at 1500 to 1600 RPM; I have blocked off all of the vaccume ports and sprayed the intake with both water and WD-40 and it doesn't make any difference. I am running 22 LB injectors, all new sensors and had my chip burned by FIS out of SA, they told me the chip makes no difference untill the system goes into closed loop. I have long tube headers with the oxygen sensors in the collectors. Any ideas.