2002 Mazda 626 High Idle When Cold

RYANLC

MEMBER
1 POST

I have a 2002 Mazda 626 4 cylinder 2.0 with about 46000 miles on it.When I first start it up after its been sitting for at least 6-8 hours its very loud and idles high at about 2 and 1/2.Then after it warms up after about 5 minutes the idling gradually goes down to about 1 and 1/2 where it should be and is nice and quiet.If the car is sitting for only a bit,it doesnt do this as much,maybe only for a couple of seconds depending on how long its been sitting.But when its been sitting for a while its quite loud.
If I drive it right after I start it up after its been sitting ,it seems to take the loudness away.

Thanks,Ryan of Cortland NY

Mar 8, 2006 at 12:20 AM

JESSESON

MEMBER
5 POSTS

I had a similar problem; it could be a leak in the air intake or the throttle sensor could be bad. There are actually several things you can try, but I feel these are more likely the problem.
Jesse

Apr 28, 2006 at 2:42 PM

SYNCRAIT

✓Experienced Mechanic
235 POSTS

Check for a vacuum leak near the vics controller

Apr 29, 2006 at 7:07 AM

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Suggested Repair

Check for a vacuum leak near the VICS controller.

Conversation Summary

A 2002 Mazda 626 2.0 with about 46,000 miles idles high and loudly at about 2.5 after sitting several hours, then gradually drops to about 1.5 and quiets down once warm. A short sit or driving soon after start reduces the symptom. Another owner suggested an air intake leak or a bad throttle sensor. The expert advised checking for a vacuum leak near the VICS controller.

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2002 Mazda 626 High Idle When Cold

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