I changed the spark plugs in my Montero and now it runs funny

Asked by Dec 15, 2014 at 09:37 PM about the 1999 Mitsubishi Montero Sport 4 Dr ES SUV

Question type: Maintenance & Repair

the motor runs but it is sluggish off the line then does ok once it shift into higher gears.
it idols fine when I first start it but doesn't idol well once it has been driven a little while

1 Answer


First I gotta tell ya i'm no expert, but sounds to me like it may be misfiring, did you change the wires too? And how about the gap on the plugs, did you gap them, if not are they pre-gapped?

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