idle problems

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Old Mar 3, 2005 | 10:16 PM
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1997XLT's Avatar
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idle problems

i have the 4.6 in my 1997 XLT, when i am at a light it is reving around 600, normal, then will pulsate back and fourth between 600 and 900, why is it doing this, has anyone had a similar problem.
 
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Old Mar 3, 2005 | 10:23 PM
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lees99f150's Avatar
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From: Susquehanna Valley, pa.
Try cleaning the IAC. search here for more info.
 
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Old Mar 4, 2005 | 12:54 PM
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From: Fort Worth,Tx
check the MAF IAC and TPS
 
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