Have Ford Questions? Ask a Mechanic for Answers ASAP
Have you checked for trouble codes in the PCM (Engine Computer)?Have you isolated what cylinder is causing the miss fire?
Try this to isolate the cylinder miss firing.
Start the engine and let it idle. Then unplug on coil at a time and see if it makes a difference in the way the engine is running. If the cylinder is not firing, it will not effect the engine. But if the coil is firing, the engine will run a little more rough.
That is true. The miss fire may not be bad enough for the PCM to see it. It has to count it to make sure what cylinder it is and set the code.
No problem. Start on the side you did the cylinder head. Also, make sure all the coils click when you plug them in, along with the injector connectors. I can honestly say.."I have done that".. after putting an engine in and had a miss. Loose #8 injector on the drivers side rear.
They will cause codes after the engine has run a while. Vacuum lines will cause lean codes. Also inspect the PCV hoses.
Just reply back on this page.