Question about 2000 Mazda 626

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Mazda 626 2000 vibrates when idling and when I put the a/c on why?

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Hello, It sounds like you may have a small vaccumn leak at idle, that is enhanced with the extra load of the A/C. There are a lot of other reasons that can cause this problem, but most of the time it is that. A stuck PVC valve can cause the same thing because it is a vaccumn leak in the engine when it gets stuck open. Another is the EGR valve also being stuck open and/or dirty. If you are familure with engine operations they you can check the above problems out fairily easily yourself. On the vaccumn lines you can look at the connections and see if the lines have developed cracks along the sides where they are pushed over the connection pipes. The PVC valve can be cleaned or replaced if plugged up or stuck. The EGR valve can be checked with a vaccumn guage installed on the engine and the with a piece of hose attached to the EGR valve, you apply vaccumn to the hose and the engine should start running worse and shaking with the vaccumn leak as the valve opens. They usually get plugged up with carbon and the start leaking and finally exceeds the ability for the ECM to correct the leak. These are just a few of the common problems that can cause your type of shaking problem. I am also assuming you have kept the maintenance up on the vehicle, i.e.: tuned up, oil changed, etc. or some of the problem could be coming from them also. Good Luck, RAC

Posted on Apr 18, 2009


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Posted on Jan 02, 2017

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SOURCE: charge light flashes and becomes solid when my mazda 626 idles


Initially, there are only a limited number of reasons why the charge indicator would light up:

  • broken/loose belt;
  • detached/loose/corroded main alternator connection;
  • defective alternator;
  • defective battery.
Since the battery is new, that would leave us with the first three (3) possibilities. Of the three, the first two could be inspected/checked even by the user. A suspected alternator would have to be bench tested to confirm if faulty. Often problem with these alternators are a defective built-in regulator. In most instances, it would be more practical to replace the alternator (if found defective) rather than to repair and just replace the regulator.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information. Good luck and kind regards. Thank you for using FixYa.

Posted on Nov 16, 2008

  • 100 Answers

SOURCE: i have a mazda 626 with a idle problem

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Posted on Apr 14, 2010

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SOURCE: my 2000 mazda 626 v6 idles up and down but at low

Most of the time when the cars idle fluctates up and down ia the IAC (idle air control) they either build up carbon and are slow to move of it is defective.

Posted on Jul 30, 2011

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