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 01-26-2007, 06:08 PM
  #1  
swillz2000
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Default rough idle

i have a 00 gt manual transmission that will have a rough idle at start sometimes.if i turn off and start it back up theidle is better. what can be causing it to have that rough idle?
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Old 01-26-2007, 06:12 PM
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rvoss5
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Default RE: rough idle

****ty fuel, bad spark plugs, there are a bunch of things. i would start by changing your spark plugs. check your coils. sounds like u might be getting a little detonation on start up.
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Old 01-26-2007, 06:55 PM
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Brandons98GT
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Default RE: rough idle

mine had same prob just today andit was the iac changed now is good to go
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