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Guest Message by DevFuse
 

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idling too fast


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4 replies to this topic

#1 qjoshh

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  • Chapel Hill

Posted 05 December 2005 - 09:33 AM

I have a 1998 Outback. I just changed the plugs and the PCV valve and cleaned the throttle body... now it's idling at 2200rpm (normal 600-800rpm)! What did I do that might have caused this to happen? From what I've read it looks like there's no way to manually adjust the idle speed on this model. Any suggestions?

#2 tunered

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  • vincent,ohio

Posted 05 December 2005 - 09:55 AM

sounds like a major vaccum leak,check all the hoses you had off.maybe one is still off or maybe a bad line.

#3 qjoshh

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Posted 05 December 2005 - 12:22 PM

sounds like a major vaccum leak,check all the hoses you had off.maybe one is still off or maybe a bad line.

A reply on another forum suggested that it might just be the ECU readjusting to new parts after having disconnected the battery, and that it should recalibrate itself after a couple of days. What's your take on this?

#4 A_DuB

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  • Leavenworth

Posted 06 December 2005 - 10:38 PM

ive had a high idle for quite some time but if i let it just sit and idle for a minute or two it seems to drop to normal levals

#5 qjoshh

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Posted 07 December 2005 - 08:41 AM

Here's what I have so far...
1) A Subaru dealer told me that this is NOT a computer issue, contrary to what came up on another forum.
2) Suspicious that the plugs might have been the problem, I put the old plugs back in... same problem: still idling at 2000-2500rpm. It does not go down, even after sitting at idle for several minutes, or after driving for some time.
3) Of the possibilities listed so far, that leaves a vacuum leak as the other possibility. I have checked all hoses... everything appears to be in place. What else can the home mechanic do to diagnose and/or repair in this situation?

These are seemingly innocuous repairs that I've performed multiple times on other vehicles in the past... strange that this one should go so wrong...?




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