this is about the gs550 i was telling you guys about early this month.
well i got some more info for you guys so you can try to help me.
when the engine is cold and i start it, it runs ok but when it warms up, like after i run it 15-20 minuits, only two of the four pistons will fire (the inside two). i will check again but i think the two pistons that arn't firing are from two sepret coils. any info would be greatly appreciated

thanks

 

i just went out and checked both pistons that arn't firing are on the same coil pack. could that be the probolem???