So I've had a consistent problem with a missfire in cylinder 4. I've changed the coil pack, plugs, wires, valve cover gasket and all 4 tube gaskets . . . can anyone think of something that I've missed or overlooked?
What is your spark plug gap and what kind of plugs are you using. I'll make a suggestion. NGK 4306 gap 0.032 your wire couldnt be making a good contact with the plug. you might also have a bad injector. you could try swapping the injector and see if the runs different. you could also can you explain exactly what the car does and when it does it and what your doing when it happends.
You mentioned wires so I assume you have an 2005. Could be a injector as mentioned. Have you tested to see if you are getting power to the injector plug? Or the actual coil pack? Could be a bad PCM Maybe fried one of the drivers..
gap is .032, I've switched plugs and wires around just to make sure that wasn't the problem. i didn't think about the injector though . . . finally an excuse to upgrade!? The problem is pretty sporadic, it's happened on the freeway going 65, it's happened sitting in the drive through waiting for food. Once it missfires i can't push her past 2300 RPM's, when i try it doesn't get any power (like hitting the governor on a civic).
That because it's in 'limp' mode. Misfires are bad. The PCM is just protecting the engine. Swap the injector to another cylinder. If the misfire follows...then you know what it is.
