Originally posted by 1slowCRX
If it is backfiring through the intake it is because the timing is off, your intake cam is advanced. If you think about it, it is firing right, but it is firing when the intake lobe is open causing the "explosion" to come out of the intake manifold. Try resetting your mechanical timing, and remember to route so that you leave all the slack on the tensioner pulley.
yea, I was thinkin my intake cam gear is off, you say it could be too advanced? could it be retarded also?