slight problem with 03 wrx. idle going low when fan or AC kicks in
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This is a discussion on slight problem with 03 wrx. idle going low when fan or AC kicks in within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; Hey everyone, A few months back I got 03 WRX. I love the car, and miss it badly at the ...

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    slight problem with 03 wrx. idle going low when fan or AC kicks in

    Hey everyone,


    A few months back I got 03 WRX. I love the car, and miss it badly at the moment (currently on deployment , in the Navy). I ran into a slight issue right before I left, so I didn't have the time to fix it, but at the same time im not fully sure what's causing the problem.

    My friend, a bit more knowledgeable with turbo'ed cars, somehow he pulled a line somewhere, probably trying to see something and pulled it and forgot I guess, and later on I was able to find the vacuum leak. During the leak the car would idle horribly at a dead stop, to the point that sometimes it would shut off. Very embarrassing.

    However, after it was fixed I still ran into one more issue. At a dead stop, the car idles fine, UNLESS the radiator fan starts to kick in, or I hit the AC button. Not long before this I could swear I heard a slight squeak whenever the AC was on while driving. AC works fine though. When the radiator fan kicks on the idle will go extremely low, then jump back up, then back down, and sometimes it will be enough to shut off the car. The AC button will almost shut the car off during a stop every time within several seconds.

    I know the dealer I bought it from had to replace the power steering belt before I bought it because it was worn pretty bad. I didn't really have enough time because this was 2 days before deployment, but I'm assuming the belt for the alternator may be worn? In the very beginning during the vacuum leak I did on search on this forum and though it may have been the Idle Air control valve, but I don't believe that could be the case anymore.

    Any other ideas on what this may be?

    Thanks,

    David

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  3. #2
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    any ideas? sorry for the bump. trying to figure all this out

  4. #3
    Registered User ex400rocks's Avatar
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    My guess is your AC compressor is taking a dump. Mine squeeks when it kicks in...and the belt is tight. If its kicking on, and almost killing the car, then my guess is that its about to seize up on you. If the dealership had to replace the belt...I would say because the compressor is so hard to turn, it burnt the belt up. Take the belt off someday, and try and turn the compressor by hand. It will have drag on it, but not CRAZY had to turn...

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    No, The dealer replaced the power steering belt, because it was looking out of shape. my guess is that the fan/ac belt was probably getting pretty bad too, but they didn't notice it.

    Most likely the belt im guessing, or atleast hoping. AC works like a champ while on the freeway or driving at any speeds above 0mph lol

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