iac

BAD98GT · December 10th, 2011, 11:02 AM

what r the benifits of removing the iac and what r some negitives....

also what r the benefits from removing the egr? would i need to get it retuned?

97S281 · December 10th, 2011, 01:35 PM

Your car will not run without the iac.

The benefit of running without the egr is that you only get fresah air into the motor. The egr recirculates exhaust gasses back into the air intake. You will not need a retune but your CEL will be on. There is also more to it than just removing the egr itself. There are vacuum lines to it that need to be capped and the actual egr tube that runs from your exhaust manifold needs to be removed and the manifold capped as well.

OptionalStang · December 10th, 2011, 04:22 PM

isnt removing a egr only good for looks and a every so slightly cleaner intake? but i say it doesnt out weight the gas mileage loss, cel and the capping of the headers and removal of the vaccum line time..imo

97S281 · December 10th, 2011, 07:17 PM

Yeah, the exhaust gasses introduced to the intake actually help the car warm up to operating temps faster. If you really want a cleaner air intake then going with a breather or catch can would be much more beneficial.

BAD98GT · December 10th, 2011, 11:48 PM

in the past i added a delete to the iac and just left the iac pluged in but not mounted to the plenum and i had no problem with it running....the idle dropped alot faster whenever i put into neutral, but it was too fast of a drop....cant you leave it hooked up and make a plate with a smaller hole in it to put in between the iac and the plenum to make the idle drop a lil faster?

heppgary · December 11th, 2011, 09:23 AM

Yes, you can make a restricter plate and lower your idle faster. you can also make a hose restricter out of a copper or brass plumbing cap, with the right size hole drilled.
Even heard of a guy that used a 3/8 socket in the hose.
I like the cap ideal the most, Just start with a small hole, and work your way up, until you get it the way you like it.
Seems the auto's hang longer than manual"s, which one you got?

BAD98GT · December 11th, 2011, 01:13 PM

mine is a manual..do u know about what size hole is good?

huh? what did he do just put a socket in the hose before the iac?

heppgary · December 11th, 2011, 05:17 PM

The plate or gasket iac restrictor mod 15/64.''
The 1/2'' copper cap iac restrictor mod 3/16'' to 7/32''
You will have to experiment alittle to see what you car likes on cold start-up.
And yes, a socket in the hose before the iac. lol

Tang Stang · December 12th, 2011, 12:36 PM

Or...you could do it the right way by changing the dashpot values in the tune.

December 10th, 2011, 11:02 AM	#1
BAD98GT Enthusiast Join Date: Feb 2010 Posts: 953 iTrader: 0 reviews	iac what r the benifits of removing the iac and what r some negitives.... also what r the benefits from removing the egr? would i need to get it retuned?

December 10th, 2011, 01:35 PM	#2
97S281 Rollin' 18/ pushin' 2 1997 Saleen S281 Join Date: Feb 2007 Location: The lost highway Posts: 6,673 iTrader: 13 reviews	Your car will not run without the iac. The benefit of running without the egr is that you only get fresah air into the motor. The egr recirculates exhaust gasses back into the air intake. You will not need a retune but your CEL will be on. There is also more to it than just removing the egr itself. There are vacuum lines to it that need to be capped and the actual egr tube that runs from your exhaust manifold needs to be removed and the manifold capped as well. __________________ MODS IN GARAGE NCMM ORIGINAL BLOWN 96-98 CREW MEMBER # 1

December 10th, 2011, 07:17 PM	#4
97S281 Rollin' 18/ pushin' 2 1997 Saleen S281 Join Date: Feb 2007 Location: The lost highway Posts: 6,673 iTrader: 13 reviews	Yeah, the exhaust gasses introduced to the intake actually help the car warm up to operating temps faster. If you really want a cleaner air intake then going with a breather or catch can would be much more beneficial. __________________ MODS IN GARAGE NCMM ORIGINAL BLOWN 96-98 CREW MEMBER # 1

December 11th, 2011, 09:23 AM	#6
heppgary Newbie 98 gt Join Date: Sep 2010 Location: arkansas Posts: 6 iTrader: 0 reviews	iac Yes, you can make a restricter plate and lower your idle faster. you can also make a hose restricter out of a copper or brass plumbing cap, with the right size hole drilled. Even heard of a guy that used a 3/8 socket in the hose. I like the cap ideal the most, Just start with a small hole, and work your way up, until you get it the way you like it. Seems the auto's hang longer than manual"s, which one you got?

December 12th, 2011, 12:36 PM	#9
Tang Stang Hardcore Enthusiast 2004 Mustang GT Join Date: Sep 2010 Location: Imperial, MO Posts: 1,961 iTrader: 2 reviews	Or...you could do it the right way by changing the dashpot values in the tune. __________________ Rod @ AzzKicker Cars 2004 Ford Mustang GT-The Driver-BBK CAI, PP TB & Inlet, Steeda UD's, SLP LM1, & 3.73's. 1990 Mercury Cougar XR7-The Meth Addict-5.0L DOHC Stroker w/2.1L KB SC. 1995 Ford F150-Mud Toy-5.0L, 4x4, 33's, & Warn 8274 Winch

December 10th, 2011, 04:22 PM	#3
OptionalStang Banned 1997 cougar 4.6 1/2PI TooFast4theFUZZ Join Date: May 2011 Location: se wi Posts: 991 iTrader: 1 reviews	isnt removing a egr only good for looks and a every so slightly cleaner intake? but i say it doesnt out weight the gas mileage loss, cel and the capping of the headers and removal of the vaccum line time..imo

December 10th, 2011, 11:48 PM	#5
BAD98GT Enthusiast Join Date: Feb 2010 Posts: 953 iTrader: 0 reviews	in the past i added a delete to the iac and just left the iac pluged in but not mounted to the plenum and i had no problem with it running....the idle dropped alot faster whenever i put into neutral, but it was too fast of a drop....cant you leave it hooked up and make a plate with a smaller hole in it to put in between the iac and the plenum to make the idle drop a lil faster?

December 11th, 2011, 01:13 PM	#7
BAD98GT Enthusiast Join Date: Feb 2010 Posts: 953 iTrader: 0 reviews	mine is a manual..do u know about what size hole is good? huh? what did he do just put a socket in the hose before the iac?

December 11th, 2011, 05:17 PM	#8
heppgary Newbie 98 gt Join Date: Sep 2010 Location: arkansas Posts: 6 iTrader: 0 reviews	The plate or gasket iac restrictor mod 15/64.'' The 1/2'' copper cap iac restrictor mod 3/16'' to 7/32'' You will have to experiment alittle to see what you car likes on cold start-up. And yes, a socket in the hose before the iac. lol

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