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.

WHATS CAUSING MY 86 5.0l PROBLEMS?

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Old 03-20-2007, 10:01 PM
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great 8
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Default WHATS CAUSING MY 86 5.0l PROBLEMS?

Ok I've had this problem before when I gowide openthrottle my car cut out but when i get of the gas then go wide open throttle its fine. Also sometimes my car will fill slugish when I'm just crusing in low rpms. I just put a brand new coil in ,A fuel pump,EGR valve and Fuel pump relay switch. And its still having the same problem .Last timeI had this problem it was my MSD box wasn't grouned good .But thats not the problem now I took the box off and its still doing the same thing.I got a feeling its sumthing electrical but iono wat could it be TPS? could sumone help please
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Old 03-20-2007, 10:02 PM
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86 5.0L
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Default RE: WHATS CAUSING MY 86 5.0l PROBLEMS?

fuel filter? fuel pump? dirty injectors?
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Old 03-20-2007, 10:04 PM
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itsslow
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Default RE: WHATS CAUSING MY 86 5.0l PROBLEMS?

maybe its the 24lb in jectors ?
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Old 03-20-2007, 10:11 PM
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great 8
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Default RE: WHATS CAUSING MY 86 5.0l PROBLEMS?

Is thing else it could besides those three things?
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Old 03-20-2007, 10:25 PM
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PONY GUY
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Default RE: WHATS CAUSING MY 86 5.0l PROBLEMS?

fuel press regulator
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Old 03-20-2007, 10:26 PM
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Default RE: WHATS CAUSING MY 86 5.0l PROBLEMS?

check tps voltage @ wot
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Old 03-20-2007, 10:26 PM
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Joel5.0
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Default RE: WHATS CAUSING MY 86 5.0l PROBLEMS?

KOEO/KOER self-tests.......
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Old 03-20-2007, 10:59 PM
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silver91gt
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Default RE: WHATS CAUSING MY 86 5.0l PROBLEMS?

what year is your car?
if its an 88 or earlier its the injectors that are causing your problems
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Old 03-21-2007, 02:54 AM
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great 8
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Default RE: WHATS CAUSING MY 86 5.0l PROBLEMS?

How would i know for sure if its the injectors?
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Old 03-21-2007, 03:03 AM
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86 5.0L
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Default RE: WHATS CAUSING MY 86 5.0l PROBLEMS?

are you still SD or MAF?
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