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.

ok.........why

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Old 04-16-2006, 11:06 PM
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5.0_GT
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Default ok.........why

Ok 88 gt i replaced all the sensors, new maf and maf ecm, all the tune up items you can think of or say normal tune up items, set base idle and tps adjustment the normal thing but the car still idles like crap what is the deal, there are no codes, i dont know anymore, iam loseing allot of faith in this car, runs great (besides the idle), sometimes it gets as bad is will rock the back back and forth, it sucks and yeah it just sucks any advice?
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Old 04-16-2006, 11:08 PM
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Tims 88GT
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Default RE: ok.........why

what rpm does it idle at?
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Old 04-16-2006, 11:11 PM
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5.0_GT
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Default RE: ok.........why

800 sometimes 1000, when it gets bad i moves up and down between 800 and 1000 but most of the time it just idles like crap at 800
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Old 04-16-2006, 11:11 PM
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gt884me
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Default RE: ok.........why

Could be a vacuum issue
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Old 04-16-2006, 11:12 PM
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Default RE: ok.........why

So it idles consistant @ 800 but it's just rough, is that what you're saying.
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Old 04-16-2006, 11:17 PM
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5.0_GT
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Default RE: ok.........why

its pulling 20 pounds of vac, yes it idles rough at 800 rpm, its like it has a very very big cam, but stock cam.
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Old 04-16-2006, 11:19 PM
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Tims 88GT
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Default RE: ok.........why

plug wires crossed?
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Old 04-16-2006, 11:20 PM
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Default RE: ok.........why

How does it run going down the road?
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Old 04-16-2006, 11:21 PM
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5.0_GT
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Default RE: ok.........why

yeah it runs great going down the road little back fireing on decel but yeah runs great when your not idleing
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Old 04-16-2006, 11:22 PM
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Default RE: ok.........why

you changed the iac?
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