Using the timing light to confirm the timing belt is not the correct procedure as you have 2 camshafts and the one running the distributor might be correct whereas the other might be out of sync.
What you have done is checking the ignition timing, not the crank and cam synchronisation.
Connect the SCS and recheck the timing, adjust if necessary.
Too high compression ratio can cause the problem too. Did you reface the cylinder head and block?
Tuesday, September 30th, 2008 AT 6:22 AM