I have a 3.4 DOHC engine. It has the Ingition Control Module which has 3 coils, each sends a spark simultainously to 2 spark plugs - one is called a waste spark which goes to the spark plug on the exhaust stroke and the other to the spark plug on the compession stroke (ie: spark plugs 1 & 4, or 2 & 5 or 3 & 6).
Your reply stated looking at the ignition rotor, which this car dosent' have. I did double check the Haynes repair manual and it does state "Exhaust stroke". The Chilton Rapair manual does not specify exhaust or compression - just says TDC on # 1 cylinder.
I wondering if the timing is somehow adjusted by the cam sensor working with the cranshaft sensor, then sending this info to the Ignition Control Module and the Powertrain Control Module - which than knows the position of the valves and therefore whether its the compression or exhaust stroke.
have the same problem?
Thursday, January 17th, 2008 AT 4:27 PM