Question about 2001 Ford Expedition

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Vehicle engine sureges between 600 and 900 rpms

Vehicle engine surges between 600 and 900 rpms with a/c on, and in gear when stopped.Misses/sputters when I acel from a stop. Does not do it with a/c off?

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Have the compressor checked,or the a/c fan is bad and there is unwanted signals being backfed in the 12v and getting into the ecu ,sometimes a bad alternator will do that and cause misfires fooling alot of techs.have the alternator output scanned with a scope.the 14.4 vdc should not have more than a few millivolts of noise.

Posted on Jul 18, 2009

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Posted on Jan 02, 2017

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