Just finished putting a new head gasket on my brother's 2004 Impala. When we try to start it, we get the starter motor, and nothing else. We then find out that we aren't getting any spark. We know that the plug and wires are good, I drove the car into the garage a week ago. I'm fairly certain that the wiring is all correct. I have no idea what could be causing this problem. Any ideas would be greatly appreciated, thanks.

 

check and recheck everything to make sure everthing is hooked up correctly. are you getting any juice to the coilpacks?

 

i put a brand new crank sensor and coil packs and still is not firing in my 2004 chevy impala