plugs a sign of injector issues?
I have had a frustrating rough idle and periodic misfire at idle on cold start ups. After 10-15 mins of driving and its fine apart from the sometimes seeming like its running 100 rpm too low sometimes at lights. Warm days seems better. It started with a change of plugs and introducing the motor to 98 RON PULP. I have checked all I can. Changed from Synergy to Ultimate, new leads, checked for vacuum leaks, advanced timing 2 degrees past normal. An exhaust analyser shows it running fine; same with a scope and a code check by my mechanic. He said apart from throwing money at it by randomly changing parts he was stumped. When he tests it the car is often warm so he said I could have one plug that only plays up when cold. He said to buy a spare and change it from day to day to see if that could find the bad plug. Well, it cant BUT I noticed that the plugs in cyl 3 and 4 have a soot over them like its running rich, 2 and 5 much less so and 1 and 6 are perfectly clean!
Is this a sign of an injector problem? Keep in mind its a CFI and not MFI.
rev@IRC. EB 3.9 auto. VDO head unit, Focal and Sony speakers, tinted, mags, pacemakers, hi-flow cat, 2.5 inch exhaust, K&N, slotted.
Last edited by rev; 10-03-03 at 03:25 AM.