1999 Jeep Cherokee Q&A

1999 Jeep Cherokee Question: PO305 error code

Jeep has started to idle rough. OBDII code reader says PO305 (#5 cylinder misfire). Changed plug and wire, no help. Problem only at idle. -
Answer 1
check the injector and do a compression test. lots of problems with exhaust valve seats going bad. Roy -
Comment 1
Compression check done. O.K. How do you "check" the injector? What about the EGR ? -