4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

rough idle

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Old 04-04-2007, 11:06 PM
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Gooman
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Default rough idle

My 99gt has had a rough idle since I bought it last summer. this last weekend I removed the iac and cleaned it

I have used techron and seafoam in it.The car set for a few years in a garage I was told by the ford dealer where I bought it.What else would you guys try......................thanks Gary
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Old 04-04-2007, 11:15 PM
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sprostang
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Default RE: rough idle

I would try new spark plugs and go from there.
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