My engine seems to run OK but it's down on power and I can't get the RPMs up like I used to. I replaced the plugs not long ago and the top spark plug on the port side still looks like new but the others are wet, including the threads, and the porcelain is a little discolored in a brown color. The problem plug looks almost like new, just a little wetness on the plug, nothing on the threads and the porcelain is black on the sides, not opaque brown like the others.
I did a compression test and that cylinder is fine. Wasn't sure if I have a spark/electrical issue or a fuel deliver problem. It's not the plug wire because I switched another one with the affected cylinder and nothign changed.
Anyone else seen this?
I did a compression test and that cylinder is fine. Wasn't sure if I have a spark/electrical issue or a fuel deliver problem. It's not the plug wire because I switched another one with the affected cylinder and nothign changed.
Anyone else seen this?