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.

5.0 Rev High from Start

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Old 07-14-2005, 02:50 AM
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86_GT_5.0
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Default 5.0 Rev High from Start

Hey all i have a 86 mustang, when i start it up it cranks for a while or when it does start it revs high for a breif sec to 3000 then drops to 1000, I have put in new tps, iac, and cleaned the tb and everything out so if anyone has any ideas what's going on i would apreaciate it thanks
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Old 07-14-2005, 03:18 AM
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primetime5.0
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Default RE: 5.0 Rev High from Start

mine does it to but not always, think its normal
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Old 07-14-2005, 03:26 AM
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91hatchgt
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Default RE: 5.0 Rev High from Start

to 3k?? hmm sounds abnormal to me.. maybe 1200-1500 not 3,000....
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Old 07-14-2005, 10:26 AM
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wildstang87
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Default RE: 5.0 Rev High from Start

sounds like its loading up on gas while its cranking, check your fuel pressure.
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