GT Performance Mods 2005+ Mustang GT Performance and Technical Information

Engine revs keep persisting

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Old 4/6/05, 07:27 PM
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Originally posted by SVTJayC@April 5, 2005, 11:19 PM
This is actually a common occurence in modern cars. It is the only way that car companies have found to control transient emissions (emissions from the engine when it is winding down between shifts). In my car, a simple restrictor could be fit inline with the IAC valve to correct the problem. I made mine out of a copper pipe top, with a small hole drilled into it. It has nothing to do with slow shifters. It is designed to do that on purpose.
Thanks for bringing this up. This is a common problem with most new cars. There is a modification to reduce this effect for 03-04 Mach1's on www.mach1registry.com
Old 4/7/05, 07:22 AM
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Does the 05 GT have an IAC valve since it uses the drive by wire throttle?????
Old 4/7/05, 08:53 AM
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As Boomer says, it really isn't that bad...come on now....a little annoying at most.
Old 4/7/05, 12:54 PM
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Originally posted by loudog@April 7, 2005, 7:56 AM
As Boomer says, it really isn't that bad...come on now....a little annoying at most.
but there is sooooooo much more you can do with an engine that drops normally and freely back to idle.
Old 4/7/05, 01:16 PM
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have to agree, the throttle lag is very annoying. I was hoping the "tune" would get this out of there, but now you say it won't?
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