High Idle - Subaru WRX Forum
 
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#1 Old 08-16-2011, 09:28 PM
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High Idle

So, today I was driving when I noticed that my car was idleing around 2300 or so. It was fine all morning. I could not get the idle to drop. I tried revving it up quick and that made it worse! It actually stayed up higher after doing that. At one point it was idleing at 3500 PRM. I stopped the car for about 5 mins and started it again. Still a high idle. I drove a little and turned it off. It set for about 15 mins or so and then the idle probelm was gone. I am wondering what would cause this. I drive an 05 WRX with no engine mods.
Thanks!!
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#2 Old 08-16-2011, 11:28 PM
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have you checked to see if there is something holding up the throttle like maybe something got caught up somewhere

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#3 Old 08-17-2011, 05:29 AM
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Did you recently clean the engine bay ?

Try cleaning the maf... Even if it isn't the MAF, it will rule it out.

Paul
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#4 Old 08-17-2011, 07:49 AM
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Yeah first thing i would check is all the throttle stuff i had a similar prob and i found that one of the clips that the throttle cable was held by was broken and it was getting bound up. happened after i replaced the ac compressor. Had that plastic cover off that's right there on the front. Just didn't get it back on right. It may not be your prob but its a place to start.

Kevin.
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#5 Old 08-17-2011, 07:57 AM
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Could also be the idle air control valve... May need cleaning/replacing.

-Chris
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#6 Old 08-23-2011, 03:51 PM
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Loosen the throttle cable on your cruise control module to give it some slack. Don't worry, it won't hurt anything. What happens is when you're stopped for long periods without airflow over the module like in traffic, the module heats up like crazy. I had mine idle up to 5000k in DC traffic before I figured out what was wrong. This is a common problem on 02-05s.

I believe a 10mm open ended wrench is what you'll need.

Jon
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#7 Old 08-29-2011, 08:45 PM
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Thanks for the info. I am going to try and loosen the throtle cable on the cruise and clean the MAF. What should I use to clean the MAF? Anything I might have sitting around? Thanks again!
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#8 Old 08-30-2011, 05:41 AM
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Use the CRC MAF cleaner.... nothing else.

$6 goes a long way with the stuff.

Paul
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#9 Old 08-31-2011, 11:03 AM
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Be VERY careful with the sensor itself inside the plastic part. It is very fragile.

Jon
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RIP Colin McRae
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#10 Old 08-31-2011, 11:41 AM
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Originally Posted by RcrsWetDream View Post
Could also be the idle air control valve... May need cleaning/replacing.
This.
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