1999 Infiniti I30 Q&A
1999 Infiniti I30 Question: Rough idle and code 1105 shows up. Egr valve is blocked but it has run well.
Repair code PO304 first and if that helps. Find out why 4 has a misfire! Possible spark plug, coil on plug, injector, vacuum leak or low compression. Best guess is C.O.P. - pushrod
Agree with wetry. Either sparks plugs, or the coil on plugs. - csubak30
rec. fuel system clean.ethanol treatment to 1 tank premium. ethanol blend in fuel causes build up in fuel system, combustion chambers,exhaust system and causes increased wear to spark plugs. build up can foul valves, injectors and trip sensors. review when last tuned. it may be due. - arturo08