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.

Rough at an idle speed

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Old 08-15-2010, 10:29 PM
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markemark06
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Join Date: Aug 2010
Location: Maryland
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Default Rough at an idle speed

Own a 90 mustang Gt that has been bugging me for about a year and a half. I've gone over the entire fuel system, found cracks in 4 out of 8 injector pintle caps. Replaced the pintle caps, sounds a lot better at idle but when I go to drive it, it bucks back and forth almost throwing me out of my seat still. Running out of ideas, I was thinkin about having the ignition control module tested but IDK if that'll have anything to do with my problem. I thinkin its timing, any advice?
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