qjoshh Posted December 5, 2005 Share Posted December 5, 2005 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? Quote Link to comment Share on other sites More sharing options...
tunered Posted December 5, 2005 Share Posted December 5, 2005 sounds like a major vaccum leak,check all the hoses you had off.maybe one is still off or maybe a bad line. Quote Link to comment Share on other sites More sharing options...
qjoshh Posted December 5, 2005 Author Share Posted December 5, 2005 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? Quote Link to comment Share on other sites More sharing options...
A_DuB Posted December 7, 2005 Share Posted December 7, 2005 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 Quote Link to comment Share on other sites More sharing options...
qjoshh Posted December 7, 2005 Author Share Posted December 7, 2005 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...? Quote Link to comment Share on other sites More sharing options...
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