Question about Mitsubishi Galant
You don't mention the model or year, which make a BIG difference.
Possible causes of poor idle:
Vacuum hose leak or intake air intake path leak.
Dirty or loose throttle body.
Throttle body IAC motor is jammed, see above. Fix is to remove the throttle body and clean it.
Dirty air cleaner.
Miss at revs...
Old plug wires or plugs.
Bad distributor coil, will also cause hard start when cold.
Timing could off setting.
Posted on Jan 03, 2011
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Posted on Jan 02, 2017
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