LT1 Optispark/timing issues

[barno68]

did you degree your cam when you installed it? I'd also check your grounds.....dumb ? but did you disable the VATS? sounds like an easy fix though...good luck!

VATS was disabled when the PCM was programed. Not sure what you mean by degreeing the cam...

[barno68]

I appreciate all the replies, and some of the suggestions I have not tried yet. But, I do not want to put the crank pully back on until I get the timing alignment figured out. As is I think I need to pull the timing cover again. Looking at both the shoebox photo and those in the Haynes manual, when the sprocket alignment dots are closest to each other, the dowel pin should be at 3 o'clock. Mine is only at that position when the cam is at 12 and the crank sprocket is at 12. I can rotate the cam back to this position, but there is no valve movement which tells me that #1 is at TDC, not #6...