How To: IAC Rev Mod (Fixing the hanging RPMs) - Page 3 - MustangForums.com



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

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Old 02-16-2009, 06:31 PM   #21
devore86
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Does this have the same effect on an auto?
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Old 02-18-2009, 01:31 PM   #22
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Quote:
Originally Posted by defconfire View Post
I am curious about the A/F at idle too.
it won't be affected at all, Idle is all closed loop operation. If needed the computer will add or remove fuel.
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Old 02-21-2009, 08:24 PM   #23
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i did this trick and the rpms dropped down to about 1500 2000 rpms and hung there for a bit. and when the car is warm the car idles at about 900 1000 rpms. think it could be a bad tps?
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Old 02-22-2009, 12:38 PM   #24
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Anybody got any pics of this install?
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Old 02-22-2009, 01:15 PM   #25
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I look mine out a couple days ago after a month. I was tired of the horrible noise it made out of my exhaust and my car stalling and turning off randomly.
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Old 02-22-2009, 01:38 PM   #26
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Quote:
Originally Posted by CoolAid View Post
- Makes the exhaust have the "gargle and pop" sound like an old hot rod when its on the down scale of a rev.
In my experience this condition has always been the result of an exhaust leak, and the faster an engine with a leak deccelerates the more it will "gargle and pop".

Other than that this is an excellent write up i will definitely be trying this mod on mine. Thanks
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Old 02-22-2009, 03:46 PM   #27
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Quote:
Originally Posted by TX97GT View Post
Is this only for a 99-04?
no go on the 96-98 4.6's?
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Old 09-18-2009, 01:18 PM   #28
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It works great. Just did my 97 GT and now it idles down like it should.
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Old 09-18-2009, 02:35 PM   #29
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Quote:
Originally Posted by Thumper2Kewl View Post
In my experience this condition has always been the result of an exhaust leak, and the faster an engine with a leak deccelerates the more it will "gargle and pop".

Other than that this is an excellent write up i will definitely be trying this mod on mine. Thanks
A lot of exhaust system that are straight through mufflers and no cats "gargle & pop". No back pressure usually causes the gargle & pop sound.
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Old 09-18-2009, 04:35 PM   #30
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January of 07...nice.
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