misfire

hey , i recently put a used engine with about 50k and also did the 60k service with all the recommended items changed. when I start the car only 4 out of 6 cylinders fire. I checked the ignition coil but its not that , i bought a new one and put that intead of coil C but still nothing. I also checked the timming , spark plugs and spark plug cable everything is new and looks fine.
any Idea what could be the problem?

It is somewhere in your wiring or ECU. That should be fun to hunt down. First I would pull the ecu and see if any of the capacitors are leaking.

http://www.stealth316.com/2-pwrtransunit.htm

http://www.stealth316.com/2-ignitioncoils.htm

http://www.stealth316.com/2-ecmremoval.htm

thank you so much for your suggestions, I'll look it uo this weekend and hopefuly find something .......thanx again.