5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Idle issue. Any ideas?

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Old 10-08-2011, 08:22 PM
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Rage91GT
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Default Idle issue. Any ideas?

I have a 91 gt all stock. When I start the car I have about 3min of good idle. After this I get a very lugging idle if that makes since. It seems to idle from maybe 800-850 rpm then drop to maybe 650-700 rpm then back again. As soon as I hit the gas it clears up and runs very smooth and strong. The only real issue I have with this idle is it makes it hard to idle through parking lots without jerking your teeth out lol. Any ideas to clear this up would be helpful.
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Old 10-09-2011, 04:59 PM
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projectresto83
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Remove the IAC and clean it and see if that helps.
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