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Old 03-26-2008, 06:06 AM   #1 (permalink)
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Default Idle rpm problem

Hello, i have an 1998 Forester (non turbo) and i will like to know why my idle rpm is at 500 rpm ? It is too low in my opinia.. and no idea what can cause this. It is like this for 2 years since i bought this car...

Can anyone tell me what to check, clean, whatever ?
thank you
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Old 03-26-2008, 06:50 AM   #2 (permalink)
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It could be that the cable has strecthed out over the years. The idle on the 98, assuming it's cable driven, is very easy to adjust. I did it on my 02 WRX. Someone else should chime in though, I don't have any pics of the linkage to really give direction.

Other than that I imagine there are several things that could cause it. Have you been up to date with maintainence items? When was the last time the air filter was changed or the MAF cleaned? Dirty injectors maybe?
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Old 03-26-2008, 08:09 AM   #3 (permalink)
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I am sorry but it can't be the cable. If i try this the ECU sets the rmp back to 500 very fast. I am thinking on checking MAF and injectors...
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Old 03-26-2008, 08:26 AM   #4 (permalink)
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Try to clean out the IACV too. (Solved my low idle/difficult to start problem).
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Old 03-26-2008, 09:18 AM   #5 (permalink)
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Are you sure it's at 500? The markings on the tach are a little misleading, the lowest mark is 500.
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Old 07-12-2008, 04:25 PM   #6 (permalink)
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i will take pictures...
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Old 07-02-2013, 06:32 PM   #7 (permalink)
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I also have a '98 and the idle seems too high to me after some work was done on it. You say it is easy to adjust - can you tell me how?

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Old 07-03-2013, 10:19 AM   #8 (permalink)
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Is the trans manual or auto?
I have a 2003 not a 98 but idle speeds for the 03 are
MT 550-750 RPM
AT 600-800 RPM
Im thinking that 98 specs should be the same. Also the dash tach may not be 100% accurate. Connect it to another tach and see what it reads.
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Old 07-12-2013, 09:13 PM   #9 (permalink)
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Quote:
Originally Posted by funkymonkey1002 View Post
Are you sure it's at 500? The markings on the tach are a little misleading, the lowest mark is 500.
Bumping this up... totally confused but is the lowest mark actually 500?? That would mean that the first set of increments is going up by 100. I've never seen that before but I would be running at the right idle (700) and I shouldn't worry about it haha.
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Old 08-02-2013, 08:33 AM   #10 (permalink)
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I'm sorry, I was taken away by other issues for awhile. My car is a standard (manual) transmission. I would still like to know how to set the idle. It appears there are two cables that control the gas feed. Which one is the correct one to adjust?


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Last edited by Rebecca; 08-02-2013 at 08:39 AM.
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