4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

unintend acceleration

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Old 04-04-2013, 07:09 PM
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bluenel
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Default unintend acceleration

Hi Sometimes when I come off the freeway and stop at a light, the car seems like it's going to die then accel This also has happened when shifting out of park into drive and revs in to drive. Any help Thanks
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Old 04-04-2013, 08:31 PM
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SXGT
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could be a vacuum leak
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Old 04-04-2013, 10:42 PM
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White03Vert
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Do you have underdrive pulleys on it? Mine does it all the time because of the pulleys.
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Old 04-05-2013, 05:52 AM
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Luke13
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I switched over to a throttle intake, and long story short ended up with a very small hole in one of the hoses leading to the front of the plenum. It made my car idle low, trying to stall out, and also made a very faint whistling noise.

Check for any holes, kinked, or disconnected hoses under the hood first off.
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Old 04-05-2013, 03:24 PM
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The02GT
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IAC.....
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Old 04-05-2013, 03:46 PM
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bluenel
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I have not changed a thing. GT has 160,000, Ford replace the first motor at 62, 000, but the problem started about 25,000 miles ago. It happens about once an outing 1/2 to an Hour or so. I will check for leaks. Thanks
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