Thread: Runs Great Cold when warmed up Surges up n down Rough Idle
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Old 11-14-2009, 11:23 AM
lkchris lkchris is offline
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Join Date: Jun 1999
Location: Albuquerque, NM USA
Posts: 1,947
Sounds like a vacuum leak.

When it's cold, computer makes mixture richer. When it warms up, computer turns this off and then it's too lean because of vacuum leak. Besides the usual possibilities for vacuum leak, don't forget idle control valve not turning off.
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