iac?

Applehead281 · August 29th, 2009, 12:37 PM

when my car idles it burps a little and it also idles very erratically on a cold start up, i changed the fuel filter and the maf is fine on a cold start it will idle from 1200 1400 back and forth its like its not getting enough of something, i have posted this thread before and some people suggested checking me fuel trim but i have no way of doing it, besides when i start it up after being drove say half an hour later it smells really rich and wants to miss, kinda like its starving for air and if i let it set and idle it clears up it has me stumped HELP.

Mustang46 · August 29th, 2009, 12:45 PM

it could be. I know that it is money out of pocket but you could get on from the parts store and install it. try it for a couple of cold starts. If it still does the same thing. then just take the part back. They usually say that you can't, but as long as you don't leave any marks on it and clean it off, they will take it back. or borrow a buddies

Just a suggestion.

Applehead281 · August 29th, 2009, 12:53 PM

yeah its a pretty expensive part 100 bucks i hate to spend the money but i am at my roads end this thing is really pissing me off, performance is kick ass that is what don't make any sense, you would think if it was bad the performance would be affected.

greengoblin · August 29th, 2009, 01:10 PM

how are your upstream o2 sensors doing have they been replaced recently. my car did pretty much the same thing only a little worse thought it was the iac replaced it to no avail turns out i have a bad o2

Applehead281 · August 29th, 2009, 01:14 PM

haven't replaced those, the car only has 30,000 miles on it, i only replace the post o2's then i installed the x pipe

greengoblin · August 29th, 2009, 01:18 PM

i would still check them they dont necessarily have to have alot of miles on them to go bad. also check your fuel trims. do you have any exahust leaks before the o2s?

Applehead281 · August 29th, 2009, 01:21 PM

thats a good possibility because i have a shit pypes brand x pipe leaks like a son of a bitch! bbk one is coming soon i will go ahead and check the o2's then not to sound stupid but how do you check fuel trims?

greengoblin · August 29th, 2009, 01:23 PM

well you need a tuner or a code reader that hooks to a laptop so you can talk to the computer.

Applehead281 · August 29th, 2009, 01:24 PM

i don't have a scanner and i got it tuned at pauls high performance in michigan would the trims shown up when he tuned it?

greengoblin · August 29th, 2009, 01:29 PM

yea i am sure he could look at them but you need to see your trims right now

Applehead281 · August 29th, 2009, 01:52 PM

k thanks!

93hatch · August 29th, 2009, 01:54 PM

pull the iac off and clean it with carb cleaner

greengoblin · August 29th, 2009, 02:03 PM

+1

careful to not get much in the motor housing as it could cause damage

Applehead281 · August 29th, 2009, 02:39 PM

done that already no change

August 29th, 2009, 12:37 PM	#1
Applehead281 Hardcore Enthusiast 2004 mustang gt 13.86@ 100.5 street tires Join Date: Jun 2009 Location: Muncie Indiana Posts: 1,227 iTrader: 0 reviews	iac? when my car idles it burps a little and it also idles very erratically on a cold start up, i changed the fuel filter and the maf is fine on a cold start it will idle from 1200 1400 back and forth its like its not getting enough of something, i have posted this thread before and some people suggested checking me fuel trim but i have no way of doing it, besides when i start it up after being drove say half an hour later it smells really rich and wants to miss, kinda like its starving for air and if i let it set and idle it clears up it has me stumped HELP. __________________ The usual bolt on's..

August 29th, 2009, 12:53 PM	#3
Applehead281 Hardcore Enthusiast 2004 mustang gt 13.86@ 100.5 street tires Join Date: Jun 2009 Location: Muncie Indiana Posts: 1,227 iTrader: 0 reviews	yeah its a pretty expensive part 100 bucks i hate to spend the money but i am at my roads end this thing is really pissing me off, performance is kick ass that is what don't make any sense, you would think if it was bad the performance would be affected. __________________ The usual bolt on's..

August 29th, 2009, 01:14 PM	#5
Applehead281 Hardcore Enthusiast 2004 mustang gt 13.86@ 100.5 street tires Join Date: Jun 2009 Location: Muncie Indiana Posts: 1,227 iTrader: 0 reviews	haven't replaced those, the car only has 30,000 miles on it, i only replace the post o2's then i installed the x pipe __________________ The usual bolt on's..

August 29th, 2009, 01:21 PM	#7
Applehead281 Hardcore Enthusiast 2004 mustang gt 13.86@ 100.5 street tires Join Date: Jun 2009 Location: Muncie Indiana Posts: 1,227 iTrader: 0 reviews	thats a good possibility because i have a shit pypes brand x pipe leaks like a son of a bitch! bbk one is coming soon i will go ahead and check the o2's then not to sound stupid but how do you check fuel trims? __________________ The usual bolt on's..

August 29th, 2009, 01:24 PM	#9
Applehead281 Hardcore Enthusiast 2004 mustang gt 13.86@ 100.5 street tires Join Date: Jun 2009 Location: Muncie Indiana Posts: 1,227 iTrader: 0 reviews	i don't have a scanner and i got it tuned at pauls high performance in michigan would the trims shown up when he tuned it? __________________ The usual bolt on's..

August 29th, 2009, 12:45 PM	#2
Mustang46 Enthusiast 2002 Mustang GT 11.85 @ 125 Join Date: Jun 2009 Location: Franklin, Ohio Posts: 972 iTrader: 2 reviews	it could be. I know that it is money out of pocket but you could get on from the parts store and install it. try it for a couple of cold starts. If it still does the same thing. then just take the part back. They usually say that you can't, but as long as you don't leave any marks on it and clean it off, they will take it back. or borrow a buddies Just a suggestion.

August 29th, 2009, 01:10 PM	#4
greengoblin Regular 1999 Mustang Gt Join Date: Apr 2009 Location: Sidney, OH Posts: 255 iTrader: 0 reviews	how are your upstream o2 sensors doing have they been replaced recently. my car did pretty much the same thing only a little worse thought it was the iac replaced it to no avail turns out i have a bad o2

August 29th, 2009, 01:18 PM	#6
greengoblin Regular 1999 Mustang Gt Join Date: Apr 2009 Location: Sidney, OH Posts: 255 iTrader: 0 reviews	i would still check them they dont necessarily have to have alot of miles on them to go bad. also check your fuel trims. do you have any exahust leaks before the o2s?

August 29th, 2009, 01:23 PM	#8
greengoblin Regular 1999 Mustang Gt Join Date: Apr 2009 Location: Sidney, OH Posts: 255 iTrader: 0 reviews	well you need a tuner or a code reader that hooks to a laptop so you can talk to the computer.

August 29th, 2009, 01:29 PM	#10
greengoblin Regular 1999 Mustang Gt Join Date: Apr 2009 Location: Sidney, OH Posts: 255 iTrader: 0 reviews	yea i am sure he could look at them but you need to see your trims right now

August 29th, 2009, 01:52 PM	#11
Applehead281 Hardcore Enthusiast 2004 mustang gt 13.86@ 100.5 street tires Join Date: Jun 2009 Location: Muncie Indiana Posts: 1,227 iTrader: 0 reviews	k thanks! __________________ The usual bolt on's..

August 29th, 2009, 01:54 PM	#12
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	pull the iac off and clean it with carb cleaner __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

August 29th, 2009, 02:03 PM	#13
greengoblin Regular 1999 Mustang Gt Join Date: Apr 2009 Location: Sidney, OH Posts: 255 iTrader: 0 reviews	+1 careful to not get much in the motor housing as it could cause damage

August 29th, 2009, 02:39 PM	#14
Applehead281 Hardcore Enthusiast 2004 mustang gt 13.86@ 100.5 street tires Join Date: Jun 2009 Location: Muncie Indiana Posts: 1,227 iTrader: 0 reviews	done that already no change __________________ The usual bolt on's..

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