LT1 Optispark/timing issues

[barno68]

well, the intake valves don't need to be open if the IAC is working. What I would try though is cracking the throttle body open just a hair and see what happens. You can use your hand or use your foot from the driver's seat. At this point, you need to do something that causes a change even if it doesn't start. If it's a repeatable change that's even better.

I opened the throttle body a bit and cranked it over, no change that I could note in anything.

[barno68]

This morning I hooked up the new ALDL cable and tried to check for codes. Freescan did not detect the correct COM port (maybe a Vista issue?) so I downloaded DataMaster which did communicate with the ECM. There were no codes present, but then again the vehicle has not run.

I am at a total loss on what to check next.