Idleing too high

kratos2250 · October 14th, 2008, 12:40 AM

I have a 95 gts and the idle won't go down below 1500 I unpluged the iac and it runs perfect. Does this mean it's bad or could it be the tps?

TKOTLARZ · October 14th, 2008, 12:44 AM

take ur IAC off and keep the electrical plugged in..have somone turn the key on and look at the IAC it should open and close as u turn the key on for sure..but if it does that doesnt mean its not the problem still..

WildWill · October 14th, 2008, 11:30 AM

more than likely the IAC.

kratos2250 · October 14th, 2008, 07:57 PM

Well I plugged up the iac with the tps unplugged and the idle went from 500 to like 800, and it runs so much better. So I think it's the tps now because when I plug it up then the idle jumps to bout' 1500, so I left it unplugged. Is this ok?

95BlackStang · October 14th, 2008, 09:38 PM

Originally Posted by kratos2250

Well I plugged up the iac with the tps unplugged and the idle went from 500 to like 800, and it runs so much better. So I think it's the tps now because when I plug it up then the idle jumps to bout' 1500, so I left it unplugged. Is this ok?

i think im having the same problem. but mine idles high and then drops then it goes back up. also my check engine light comes on then turns up

WildWill · October 15th, 2008, 09:37 AM

well it is very likely that both will have to be replaced at some point, so you might as well start by replacing the IAC, if that fixes your problem, so be it, if it doesn't, look at the tps.

TKOTLARZ · October 15th, 2008, 03:55 PM

replace them both..it'll make a hell of a difference..you'll be very happy..i know the IAC is alot more than the TPS

flamedstang95 · October 16th, 2008, 02:17 PM

You can probably replace them both for a little under 100 bucks. They're 13 y/o parts, they're not going to perform like they did when new.

1slo5.0 · October 16th, 2008, 05:09 PM

Originally Posted by kratos2250

Well I plugged up the iac with the tps unplugged and the idle went from 500 to like 800, and it runs so much better. So I think it's the tps now because when I plug it up then the idle jumps to bout' 1500, so I left it unplugged. Is this ok?

Unplugging a sensor and the car running differently doesn't mean it is bad. There are many things that can cause your problem. A bad mass airflow sensor, vacuum leak, ignition timing, IAC are just some of the possibilities. The first thing to do would be to scan the computer whether you have a check engine light on or not. The next thing to do would be to check for vacuum leaks.

kratos2250 · October 17th, 2008, 01:22 AM

Well I don't have a check engine on, maybe it don't work? I don't know I'll just take it and scan the computer and see what happens.

1slo5.0 · October 17th, 2008, 10:27 AM

Originally Posted by kratos2250

Well I don't have a check engine on, maybe it don't work? I don't know I'll just take it and scan the computer and see what happens.

The check engine light doesn't always stay on when you have codes stored in the computer.

kratos2250 · October 18th, 2008, 04:36 PM

prob. fixed bad tps

kratos2250 · October 18th, 2008, 08:15 PM

It still acts up and idles a little high like 1200rpm. I has a lot more POWER omg so I unplugged my iac and it runs good. I think I'm gonna have to replace it too. In an eariler reply it was said that if I take the iac off my car, leave it plugged up, then turn my key on it should open. Well I did that and all that happen was a click it didn't really move. Does this mean it's bad?

TKOTLARZ · October 19th, 2008, 03:57 AM

Originally Posted by kratos2250

It still acts up and idles a little high like 1200rpm. I has a lot more POWER omg so I unplugged my iac and it runs good. I think I'm gonna have to replace it too. In an eariler reply it was said that if I take the iac off my car, leave it plugged up, then turn my key on it should open. Well I did that and all that happen was a click it didn't really move. Does this mean it's bad?

yea its bad..go buy a new one , and problem solved for sure

October 14th, 2008, 12:40 AM	#1
kratos2250 Regular Join Date: Feb 2007 Posts: 133 iTrader: 0 reviews	Idleing too high I have a 95 gts and the idle won't go down below 1500 I unpluged the iac and it runs perfect. Does this mean it's bad or could it be the tps? __________________ 2003 Black Cobra. Steggy stg 3 port, 2.76/4lb, JLT CAI, Dragon t/b, 60s, BAP, Mafia, sct SF3, Afco H/E, MAC LTs w/ORX-pipe, Borla stingers, MM FLSCs, MM cc plates, Billetflow IRS brace, Eibachs, 315 Toyo R888, 18in bullits. 526/506 7.8 1.9 60ft 92mph

October 14th, 2008, 12:44 AM	#2
TKOTLARZ Hardcore Enthusiast 1994 GT Join Date: Nov 2007 Location: lake worth, Florida Posts: 1,002 iTrader: 0 reviews	take ur IAC off and keep the electrical plugged in..have somone turn the key on and look at the IAC it should open and close as u turn the key on for sure..but if it does that doesnt mean its not the problem still.. __________________ Cohagan Engineering, Inc.

October 14th, 2008, 11:30 AM	#3
WildWill Hardcore Enthusiast 1995 Mustang GT Join Date: Oct 2007 Location: Solomons, MD Posts: 1,112 iTrader: 0 reviews	more than likely the IAC. __________________ GT40p heads, 1.7 crane RR's, GT40 u/l, MAC LTs, MAC o/r h-pipe, Flowmaster 40s, 65mm t/b, '03 Cobra Bilstein Struts, Tokico Bullitt Shocks, MM c/c plates, Eibach Sportlines, B&M shifter, 255lph f/p, RAM p/g clutch, Fidanza alum fly, rebuilt t-5

October 14th, 2008, 07:57 PM	#4
kratos2250 Regular Join Date: Feb 2007 Posts: 133 iTrader: 0 reviews	Well I plugged up the iac with the tps unplugged and the idle went from 500 to like 800, and it runs so much better. So I think it's the tps now because when I plug it up then the idle jumps to bout' 1500, so I left it unplugged. Is this ok? __________________ 2003 Black Cobra. Steggy stg 3 port, 2.76/4lb, JLT CAI, Dragon t/b, 60s, BAP, Mafia, sct SF3, Afco H/E, MAC LTs w/ORX-pipe, Borla stingers, MM FLSCs, MM cc plates, Billetflow IRS brace, Eibachs, 315 Toyo R888, 18in bullits. 526/506 7.8 1.9 60ft 92mph

October 15th, 2008, 09:37 AM	#6
WildWill Hardcore Enthusiast 1995 Mustang GT Join Date: Oct 2007 Location: Solomons, MD Posts: 1,112 iTrader: 0 reviews	well it is very likely that both will have to be replaced at some point, so you might as well start by replacing the IAC, if that fixes your problem, so be it, if it doesn't, look at the tps. __________________ GT40p heads, 1.7 crane RR's, GT40 u/l, MAC LTs, MAC o/r h-pipe, Flowmaster 40s, 65mm t/b, '03 Cobra Bilstein Struts, Tokico Bullitt Shocks, MM c/c plates, Eibach Sportlines, B&M shifter, 255lph f/p, RAM p/g clutch, Fidanza alum fly, rebuilt t-5

October 15th, 2008, 03:55 PM	#7
TKOTLARZ Hardcore Enthusiast 1994 GT Join Date: Nov 2007 Location: lake worth, Florida Posts: 1,002 iTrader: 0 reviews	replace them both..it'll make a hell of a difference..you'll be very happy..i know the IAC is alot more than the TPS __________________ Cohagan Engineering, Inc.

October 16th, 2008, 02:17 PM	#8
flamedstang95 Regular 1995 Mustang GT Join Date: Jan 2008 Location: Magnolia, DE Posts: 386 iTrader: 0 reviews	You can probably replace them both for a little under 100 bucks. They're 13 y/o parts, they're not going to perform like they did when new. __________________ See garage for mods

October 17th, 2008, 01:22 AM	#10
kratos2250 Regular Join Date: Feb 2007 Posts: 133 iTrader: 0 reviews	Well I don't have a check engine on, maybe it don't work? I don't know I'll just take it and scan the computer and see what happens. __________________ 2003 Black Cobra. Steggy stg 3 port, 2.76/4lb, JLT CAI, Dragon t/b, 60s, BAP, Mafia, sct SF3, Afco H/E, MAC LTs w/ORX-pipe, Borla stingers, MM FLSCs, MM cc plates, Billetflow IRS brace, Eibachs, 315 Toyo R888, 18in bullits. 526/506 7.8 1.9 60ft 92mph

October 18th, 2008, 04:36 PM	#12
kratos2250 Regular Join Date: Feb 2007 Posts: 133 iTrader: 0 reviews	prob. fixed bad tps __________________ 2003 Black Cobra. Steggy stg 3 port, 2.76/4lb, JLT CAI, Dragon t/b, 60s, BAP, Mafia, sct SF3, Afco H/E, MAC LTs w/ORX-pipe, Borla stingers, MM FLSCs, MM cc plates, Billetflow IRS brace, Eibachs, 315 Toyo R888, 18in bullits. 526/506 7.8 1.9 60ft 92mph

October 18th, 2008, 08:15 PM	#13
kratos2250 Regular Join Date: Feb 2007 Posts: 133 iTrader: 0 reviews	It still acts up and idles a little high like 1200rpm. I has a lot more POWER omg so I unplugged my iac and it runs good. I think I'm gonna have to replace it too. In an eariler reply it was said that if I take the iac off my car, leave it plugged up, then turn my key on it should open. Well I did that and all that happen was a click it didn't really move. Does this mean it's bad? __________________ 2003 Black Cobra. Steggy stg 3 port, 2.76/4lb, JLT CAI, Dragon t/b, 60s, BAP, Mafia, sct SF3, Afco H/E, MAC LTs w/ORX-pipe, Borla stingers, MM FLSCs, MM cc plates, Billetflow IRS brace, Eibachs, 315 Toyo R888, 18in bullits. 526/506 7.8 1.9 60ft 92mph

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