Sixth cylinder misfire...

[Bgingery]

I have an 2002 chevy Tahoe and have a sixth cylinder misfire ONLY when my truck idles for a long period of time. I have replaced the sixth cylinder coil pack, all spark plug wires all spark plugs. Next I'll be replacing fuel injectors. If anyone has any other ideas.. PLEASE HELP! Thanks

 

[MO Viet Vet]

May well be the injector. When you replaced all plugs did they all look the same or did #6 look different than the others?

 

[Bgingery]

All looked the same....

 

[MO Viet Vet]

Ok, so that tells me that no oil fouling problems. Does sound like the injector is likely the cause unless your have a rare driver going bad in the PCM. Check all wiring to injector and connection.

 

[Bgingery]

Ok, thank you for the info

 

[Bgingery]

I replaced fuel injector at 6th cylinder. Removed code. Ran truck for 10 minutes. Code came back. Any other ideas?