2001 5.0 cylinder 2 over firing misfire

[JeffD11N]

My x keeps kicking a cyl 2 misfire. Random misfire and lean bank 1 codes come up but after you clear them the cyl 2 comes back right away.

I have replaced the motorcraft wires with new motorcraft wires and a new motorcraft platinum plug for that cylinder. Still sets the code. Figured it has to be the coilpack. New motorcraft coil, same cylinder 2 miss.

After a good number of non repeatable words I thought for giggles lets put a timing light on it to see what it flashing. 7 cylinders flash the normal steady pulse. Number 2 on the other hand will flash a couple of times then give you a bursts of flashes between the normal pulse rate that may do it real quick or give a multiple 5 second long burst. There is no pattern at all to the bursts. The silly ******* is over firing and getting out of time.

Any ideas?

 

[Mbrooks420]

I’d pull the other plugs and compare them to the one you took out. I’d also replace the 7 remaining plugs.

 

[JeffD11N]

The reason I did not replace the other 7 is they only have 5k on them. I water tested the wires and could see an arc on #2.

I do believe I found the problem after my first post. I remembered an old school in line spark tester I have. I put that on the plug and fired it up. Nice steady pulse no bursts (IDK what the timing light was doing) and still missing. I pulled the wire off of the injector and put it back on. Abra Cadabra problem gone. Now lets see if it stays that way.

 

[boominXplorer]

Good to hear you figured it out. The miss fire with a lean code on that same bank definitely points to an injector not firing.