Sup Mod keeping the peace
Joined: Dec 2004
Location: NJ (Philadelphia area)
From your description of the problem, it still points to something that's seized up in the engine or in the AC compressor. When you attempt to turn the crankshaft manually, do you turn it at least one full revolution (360 degrees). When trying to start the engine, make sure the AC is shut off; to eliminate the AC compressor causing the problem. Scribe a chalk mark on the crank pulley then have someone try to start the car while you watch the crank pulley turning to see if it gets hung up at a certain point. You might have a condition of hydrostatic lock; hydrostatic lock is a failure of the engine, where the unit can’t run due to fluid entering the combustion chamber above the piston and preventing it from completing its cycle.
KA-T for life, yo!