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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.

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Old 06-20-2012, 10:00 PM   #11
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aslong as u dont say u need a tranny rebuild i'm happy lol
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Old 06-20-2012, 11:02 PM   #12
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Finding the leak ain't so bad. Go get yourself a vacuum tester kit. Same thing as those 1 person brake bleeder tools. Hook it in to the vacuum tree and see if the vacuum is low. Should pull around 16 @ idle with a stock cam. If not, start pinching off various parts of the rubber hoses leading to different things until it starts to move towards 16, then you've found the culprit system.

Don't forget that a vacuum leak doesn't necessarily have to be a vacuum line. The intake manifold gaskets are under a vacuum, and if they leak, you have a vacuum leak. Use carb cleaner or starting fluid to check the gaskets for air leaks while its running.

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Old 06-21-2012, 06:58 PM   #13
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and i forgot to mention when i bought it. the kid said it had a high stall torque converter could that be an issue?
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Old 06-21-2012, 07:03 PM   #14
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when u say vacuum tree u meen distribution block. or can it go on anywhere?
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Old 06-21-2012, 07:14 PM   #15
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i checked dont have tool yet but does the egr sapose to always have vac. it had none but the fuel pressure reg. did and when i pulled it off idle came up a lil and sounded better??
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Old 06-21-2012, 08:08 PM   #16
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no, the egr receives a switched vacuum dependent on RPM. Still need you to check fuel pressure and report back. 32psi running with vac on, 39psi without vac.
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Old 06-22-2012, 05:02 PM   #17
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What is done to the car that it needs a high stall torque convertor?
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Old 06-22-2012, 07:01 PM   #18
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dont no just got it.. just remember the kid say'in that
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Old 06-22-2012, 07:03 PM   #19
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have not had a chance to get to autozone yet to use psi toolfor vac. or to check fuel pres. prob tomorrow after work..
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Old 06-23-2012, 09:46 PM   #20
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checked vac. presure was bouncing but looked like 18psi. i dont no how to check fuel presure..tho.. also yesterday i added fuel injector cleaner.. and today i added half quart of tranny fluid and it seemd alot better exept in overdrive its my tranny going i think..
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Old 06-23-2012, 09:46 PM
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