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.

idle went crazy today at a red light anyone?

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Old 10-03-2007, 02:41 PM
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blk89lx
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Default idle went crazy today at a red light anyone?

hey guys i was at a light today and mu idle just started to go nuts it dropped down and was about to stall out. sounded like i had a big cam lol but nope stock motor. what the hell can this be. anyone?
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Old 10-03-2007, 02:44 PM
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Hawk
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Default RE: idle went crazy today at a red light anyone?

Idle Air Control may be clogged. Easy enough to check, just take it off and try cleaning it with some carb cleaner.
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Old 10-03-2007, 04:39 PM
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stang8689
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Default RE: idle went crazy today at a red light anyone?

Clean IAC first, then do a new cap rotor, plugs, wires, and check timing
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Old 10-04-2007, 01:51 PM
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StevoX1
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Default RE: idle went crazy today at a red light anyone?

that happened to me once, car was fine but all of a sudden it started to idle so low it'd almost cut out..it turned out to be the vacuum hose, shot on one end..replaced it and it was back to normal
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Old 10-04-2007, 03:43 PM
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86GreenMachine
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Default RE: idle went crazy today at a red light anyone?

Which vaccum hose did you replace?curious thats all
ORIGINAL: StevoX1

that happened to me once, car was fine but all of a sudden it started to idle so low it'd almost cut out..it turned out to be the vacuum hose, shot on one end..replaced it and it was back to normal
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Old 10-04-2007, 06:08 PM
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koesterca1
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Default RE: idle went crazy today at a red light anyone?

Same thing happened to me once..It turned out to be the hose right up under the front of the intake manifold. It was cracked around the hose clamp.So you might want to check that one.
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Old 10-04-2007, 08:07 PM
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Curlytop
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Default RE: idle went crazy today at a red light anyone?

check your vacuum lines. then try cleaning your iac or buying a new iac. and while you're messing with the iac clean your throttle body.
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