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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 01-24-2014, 10:05 AM   #1
88horserider
 
Join Date: Jul 2013
Vehicle: 88 FORD MUSTANG GT
Location: NC
Posts: 19
Default ENGINE STALLS RANDOMLY

i have a 88 foxbody gt, with the 5.0 engine and aft add-ons. stage II cam, edlebrock aluminum heads, trickflow upper and lower intake, bbk throttle body, bbk c.a.i...... i have an issue with it cutting off on me at random like when i go in on the clutch to stop or slow down. it does it throughout the heat range (cold & hot) but it strangely seems to do it more once it gets hot. To add to my ball of confusion, it has a louder than normal intake whistle at idle but goes away once you crack the throttle. i have replaced the lower & upper intake gaskets thinking i had a vaccum leak somewhere but it hasn't changed my problem.

with all that said, does the idle air control valve really serve a purpose once you upgrade to aftermarket parts and flowing way more air than stock (cam,intake,heads,etc...) because i can unplug mine and it has no effect on the car at all... could this be my problem? any suggestions for things to check
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Old 01-25-2014, 06:46 PM   #2
aode08
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Join Date: Oct 2005
Vehicle: 91 Mustang GT
Location: Ohio USA
Posts: 4,614
Default

Blow a cigar through the brake booster vacuum line, the whole thing, you'll find any vacuum leaks in the motor.Then do the same to the brake booster itself, they can also leak lol.

Do that first and report back, I had the same issue,when modded ill show you free remedies and cant wait to do so, so do that and report back
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Old 02-18-2014, 10:54 AM   #3
88horserider
 
Join Date: Jul 2013
Vehicle: 88 FORD MUSTANG GT
Location: NC
Posts: 19
Default

thanks for your reply, due to the weather here and my work schedule i have not been able to do what you suggested yet. But i have intentions to do it when the weather breaks and i will let you know what i come up with.

Quote:
Originally Posted by aode08 View Post
Blow a cigar through the brake booster vacuum line, the whole thing, you'll find any vacuum leaks in the motor.Then do the same to the brake booster itself, they can also leak lol.

Do that first and report back, I had the same issue,when modded ill show you free remedies and cant wait to do so, so do that and report back
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Old 02-18-2014, 10:54 AM
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