erratic idling

Asked by Aug 23, 2009 at 09:44 PM about the 1993 Mazda MX-6 2 Dr LS Coupe

Question type: Maintenance & Repair

we have changed the idle air control valve with a used one, replaced the alternator, cap & rotor, but it still has this erratic idling, any ideas?

3 Answers

40

what do you mean erratic? is the car vibrating at normal idle speed? a number of things can cause a harsh idle, it good be bad fuel, bad injectors, bad engine mounts.. check those, don't replace anything before you're sure what's causing it.

35

yeah. it is probably your vacuum lines; make sure they are all going some place; you might have a reverse vacuum on a line; does it start up fine and once it warms up it idles from about 1200 rpm down to almost stalling out?

3 out of 3 people think this is helpful.

Mine idles at times. Shuts off once in a while.

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