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

50

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.

1 of 1 people found this helpful.
45

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?

4 of 4 people found this helpful.

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

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