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rough idle


 
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pedanticfish
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Joined: 17 May 2005

PostPosted: Tue May 17, 2005 1:38 pm    Post subject: rough idle Reply with quote

my 90 Cherokee has an erratic idle a lot of the time. It'll wander between 200 and 400 rpms most of the time I'm stopped. I've noticed that if I drive with a heavy foot the idle will even out at around 600. I don't have any money so I'd like to fix it myself before taking it to a shop. Any help would be great thanks.
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MachineMan
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Joined: 18 Jan 2005
Location: Northern CA, USA

PostPosted: Tue May 17, 2005 2:56 pm    Post subject: Reply with quote

Check all the vacuum lines.

My '90 was idling low when my MAP sensor vacuum line had a crack in it.

Here's some pics of vacuum lines on a '90..
http://www.4x4trailhunters.com/article.php?id=16
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pedanticfish
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Joined: 17 May 2005

PostPosted: Wed May 18, 2005 9:07 pm    Post subject: Reply with quote

i checked all the vacuum lines they seem fine. if the map is broken how can I check it?
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