when started n Idle/running, rpm bounces between 2000 to 3000 & keeps on bouncing...

Asked by Oct 12, 2009 at 06:58 PM about the 2000 Mazda 626 LX V6

Question type: Maintenance & Repair

I dont know, I started from my office to home, when i started my car, rpm was 3000, then it came down to 1500, then its keeps bouncing between 2k to 3k. Then I thought might be cold problem. So I let the engine run for some time. But no effect it is some problem. I don't know Wat is it. I kept my car at office and drove back with my friend. Please suggest me any solution...

3 Answers


check the intake tube. they often break and crack and cause a vacuum leak.

1 of 1 people found this helpful.

It could be that there is a vacuum leak. Listen closely to the engine under the hood. If there is a hissing sound it, its a good indicator of a vacuum leak. fixing it is not a big job, if u do it yourself!


I have a 1991 Mazda 626 LX. My car did this same thing. I had my throttle positioning sensor (TPS) replaced which helped a little bit. My mechanic took off the idle air control (iac) and cleaned it w/ carb spray. Put it back on the car, adjusted the idle for it & the TPS. He adjusted the IAC idle down between 700-750. This really seemed to fix the problem. Now it doesn't bounce around anymore. My car isn't a turbo but it does start out in power mode when first started. The RPMs are around 2000, but come down to the 700 mark within 5-6 mins.

Your Answer


Looking for a Used 626 in your area?

CarGurus has 174 nationwide 626 listings and the tools to find you a great deal.


Mazda 626 Experts

  • #1
  • #2
  • #3
View All

Related Models For Sale

Used Toyota Camry
1,037 Great Deals out of 85,968 listings starting at $1,296
Used Honda Accord
1,092 Great Deals out of 71,806 listings starting at $850
Used Mazda MX-5 Miata
66 Great Deals out of 4,236 listings starting at $2,995
Used Mazda B-Series Pickup
156 listings starting at $1,250
Used Mazda RX-7
58 listings
Used Mazda Protege
216 listings
Used Honda Civic
774 Great Deals out of 60,518 listings starting at $950

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.