Engine wont' idle under 2,000 rpm

Hethj7 · 05-27-2003, 02:57 PM

When I first start my car up, it idles fine. But, after driving for a bit, it idles around 2,000 rpm and does not kick back down to normal. Nothing mechanical seems to be wrong, such as my cable being in a bind or the butterfly valve being stuck open. Could something be wrong with my IAB? Give me your thoughts.

drtbiker · 05-27-2003, 09:58 PM

i thought hanging idle means tps.... but i am not sure

Hethj7 · 05-27-2003, 10:12 PM

That could be, but I don't know why it would have changed all of a sudden. I should get some time throughout the week to look at it. If I can get a hold of a voltmeter, I will check TPS to make sure it hasn't changed.

ChunkFunky · 05-28-2003, 07:15 AM

I dont know what your problem is.. but sensors are wierd like that.. they just GO... I had an 87 chevy celebrity and one day it wouldnt start.. turned out it was the CRANK POSITIONS SENSOR... it ran fine when I parked it... the next day.. nothing... a 12 dollar part cost like 100 bucks to replace.. kinda funny like that.. so if it's your TPS at least its easy to replace
-as

Mountain Main · 05-28-2003, 07:19 AM

Have you tried to pull any codes?

Hethj7 · 05-28-2003, 09:56 AM

I haven't pulled any codes yet. I should have a chance to do that today or tomorrow afternoon. I will let you guys know what I find out when I do. Thanks for the replies!

drtbiker · 05-28-2003, 11:34 PM

I think my money is on tps. But then again it could be somthing else but it is weird how sensors just go like that. It can be so agravating

later

05-27-2003, 02:57 PM	#1
Hethj7 Mizzou Tigers Join Date: Apr 1999 Location: weston, MO United States Posts: 1,455	Engine wont' idle under 2,000 rpm When I first start my car up, it idles fine. But, after driving for a bit, it idles around 2,000 rpm and does not kick back down to normal. Nothing mechanical seems to be wrong, such as my cable being in a bind or the butterfly valve being stuck open. Could something be wrong with my IAB? Give me your thoughts. __________________ 2006 Mustang GT 1990 LX GT-40 motor 262 horsepower, 307ft-lbs (sold but forever loved) 1998 Contour SVT Rice Haters Club Member #244

05-27-2003, 09:58 PM	#2
drtbiker Registered Member Join Date: Jan 2002 Location: Mt. Prospect,IL Posts: 474	i thought hanging idle means tps.... but i am not sure __________________ 87-ford-mustang-SOLD! mods: 3:73's, off road h-pipe, b303 cam in gt- 40 motor w/ Power Plus intake, edelbrock 70mm tb & egr spacer, 72mm C&L, bbk long tubes, tremec tranny, centerforce dual friction clutch, upr and lwr CA's 255lph FP and soon more to come.... when i have money again SOME ADVICE Don't do burn outs in reverse it is very expensive New times with dead hook on dr's 13.27@103 with 2.0 60 foots w/100lb system Fastest time to date: 12.8@113

05-27-2003, 10:12 PM	#3
Hethj7 Mizzou Tigers Join Date: Apr 1999 Location: weston, MO United States Posts: 1,455	That could be, but I don't know why it would have changed all of a sudden. I should get some time throughout the week to look at it. If I can get a hold of a voltmeter, I will check TPS to make sure it hasn't changed. __________________ 2006 Mustang GT 1990 LX GT-40 motor 262 horsepower, 307ft-lbs (sold but forever loved) 1998 Contour SVT Rice Haters Club Member #244

05-28-2003, 07:15 AM	#4
ChunkFunky Registered Member Join Date: Apr 2002 Location: Tustin, CA Posts: 465	I dont know what your problem is.. but sensors are wierd like that.. they just GO... I had an 87 chevy celebrity and one day it wouldnt start.. turned out it was the CRANK POSITIONS SENSOR... it ran fine when I parked it... the next day.. nothing... a 12 dollar part cost like 100 bucks to replace.. kinda funny like that.. so if it's your TPS at least its easy to replace -as __________________ '89 GT Convertible: TFS TW Heads, TFS Street Intake, TFS Stage 1 Cam, FMS 1.6 RRs, 24# Injectors, Pro-M 75mm MAF, No Name CAI, 3.73s, O/R H-Pipe, FlowMasters, AOD w/ Trans-Go Shift Kit

05-28-2003, 07:19 AM	#5
Mountain Main Registered Member Join Date: Feb 2003 Location: Minturn, CO 81645 Posts: 109	Pull some codes. Have you tried to pull any codes?

05-28-2003, 09:56 AM	#6
Hethj7 Mizzou Tigers Join Date: Apr 1999 Location: weston, MO United States Posts: 1,455	I haven't pulled any codes yet. I should have a chance to do that today or tomorrow afternoon. I will let you guys know what I find out when I do. Thanks for the replies! __________________ 2006 Mustang GT 1990 LX GT-40 motor 262 horsepower, 307ft-lbs (sold but forever loved) 1998 Contour SVT Rice Haters Club Member #244

05-28-2003, 11:34 PM	#7
drtbiker Registered Member Join Date: Jan 2002 Location: Mt. Prospect,IL Posts: 474	I think my money is on tps. But then again it could be somthing else but it is weird how sensors just go like that. It can be so agravating later __________________ 87-ford-mustang-SOLD! mods: 3:73's, off road h-pipe, b303 cam in gt- 40 motor w/ Power Plus intake, edelbrock 70mm tb & egr spacer, 72mm C&L, bbk long tubes, tremec tranny, centerforce dual friction clutch, upr and lwr CA's 255lph FP and soon more to come.... when i have money again SOME ADVICE Don't do burn outs in reverse it is very expensive New times with dead hook on dr's 13.27@103 with 2.0 60 foots w/100lb system Fastest time to date: 12.8@113

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