dlivewyer
Newbie
'94 c1500 with a new 355 blueprint engine. I used the original TBI with 80 lbs injectors, vortec fuel pump and FPR, with a custom tune. It runs good, but it's not advancing the timing like it should. With a scanner hooked up, it shows 10 degrees of timing at idle and when the motor is raced up, it will advance the timing to about 22-23 degrees. BUT, when you put it in gear with a load on it, it drops timing to 0 degrees and will not advance it when accelerated. It has a new distributor, knock sensor, MAP sensor, and temp sensors. Does anyone have a clue what could be causing this thing not to advance the timing with a load? Thanks.