Hi,
My '95 Town Car with 4.6 SOHC V-8 is missing on the # 1 cylinder. The computer says so, and the spark plug indicates incomplete combustion as it is pretty black compared to all the others. Sometimes it the engine backfires into the intake plenum especially under acceleration. I have eliminated the coil pack (swapped sides), spark plug (replaced all) , and spark plug wire (replaced) as the problem. Should I be looking at fuel delivery i.e. plugged injector, or even valve train problems or is there something I have overlooked in the ignition sector? My gut tells me it's ignition related, especially because of the intermitent "cough" up the intake manifold...reminds me of crossfire. Is there an electrical/electronic component that would only effect the # 1 cylinder that I haven't already checked out, or should I move on to fuel or valve train?
Thank you in advance anjyone who can help me.
Brad