EASY WAY TO DIAGNOSE A MISFIRE

[@RickRamo]

LoL, I am dealing with a 2011 Buick Enclave (P0303, P0305). Looks like I have to lift the intake manifold to get to the plugs. Sort of makes it easy to justify throwing parts at it and replace all six plugs and six coils and be done with it. It also has P0240 so I am tossing a coin over replacing the catalytic converters or trying the snake oil treatment and see if it goes away. I really mis the Lincoln MkIV these days.

[@jnhook8086]

Easy way to find one result. Could also be low compression, vacuum leak, valves, electrical

[@jean-sebastienguay1282]

And what could it be if it's stays to the same cylinder and the spark plug is good and new. 2.0L turbo 2007 Pontiac Solstice.

[@PhillipsVision]

Could be a ton of different things. It’s best to have a mechanic check it.

[@shadf7902]

Next would be check the injectors and clean them. If they dont work compression test it and see if that cylinder has low comp, or no comp. If no comp its head gasket or valve related most likely