93' Ranger High Idle Helppppppp!!!!!

danny910 · 07-08-2012, 09:21 PM

Idles around 1500 with sitting still but when driven it will be as high as 2100rpm when I go to stop. By the way it is a 4.0 manual 2wd. When I stop & apply brakes fully the rpm falls back to 1500. I haven't found any valcum leaks & the only thing that has been done was a ecu replacement back in Feb. After the ecu replacement it ran great. Really need some help guys.............

**RangerX** · 07-08-2012, 10:22 PM

So there's no missing caps or hoses on the vacuum tree?

danny910 · 07-09-2012, 08:06 AM

no none at all.

danny910 · 07-09-2012, 08:57 AM

going to try to reset my emc to see if that helps any. will post results

danny910 · 07-09-2012, 09:53 PM

reset emc but very little difference

**Tbars4** · 07-09-2012, 10:02 PM

..You could do a search on here for "Idle" or "High idle" while you wait for someone to answer your question..

Carguy3J · 07-23-2012, 05:00 PM

Try unplugging the IAC valve wire while it is running. If the idle drops , there's your problem. Fords are pretty well known for IAC failures. Don't bother trying to clean it, just get a new one.

I would also check to make sure that your throttle isn't sticking open. The throttle body could be gummed up, or the return springs could be worn and weak. This just happened to my Ranger, and I'll probably be buying a BBK replacement soon.

07-08-2012, 09:21 PM	#1
danny910 Wannabe Elite Explorer Dunn N.C. 93' SPLASH Join Date: Mar 2009 Posts: 17 Vehicle Specs (Original Poster)	93' Ranger High Idle Helppppppp!!!!! Idles around 1500 with sitting still but when driven it will be as high as 2100rpm when I go to stop. By the way it is a 4.0 manual 2wd. When I stop & apply brakes fully the rpm falls back to 1500. I haven't found any valcum leaks & the only thing that has been done was a ecu replacement back in Feb. After the ecu replacement it ran great. Really need some help guys.............

07-08-2012, 10:22 PM	#2
RangerX Moderator Elite Ranger Omao, Kauai '93 Ranger XLT 4X4 Join Date: Jul 1999 Posts: 7,196 Vehicle Specs	So there's no missing caps or hoses on the vacuum tree? __________________ Bill Collins 93 Ranger XLT 4X4 "Beauty is only sheet metal deep."

07-09-2012, 10:02 PM	#6
Tbars4 Offroad Moderator anaheim hills,california 95 ranger 4x4/ 91 X 4x4 Join Date: Mar 2007 Posts: 21,927 Vehicle Specs	..You could do a search on here for "Idle" or "High idle" while you wait for someone to answer your question.. __________________ I have Rocks in my head. What's in yours? '95 ranger xl 4x4 2.3L std cab, 2 sticks Ranger RegistryThe Squirrel '91 4x4=To much to list, much more to add.. Project "X" and more Pics & Mod's List How to: Wheels,Tires, & Lifts... Buy Explorerforum.com Items here

07-23-2012, 05:00 PM	#7
Carguy3J Wannabe Elite Explorer North East New Jersey '99 4dr. XLT SOHC A4WD Join Date: Jun 2008 Posts: 1,152 Vehicle Specs	Try unplugging the IAC valve wire while it is running. If the idle drops , there's your problem. Fords are pretty well known for IAC failures. Don't bother trying to clean it, just get a new one. I would also check to make sure that your throttle isn't sticking open. The throttle body could be gummed up, or the return springs could be worn and weak. This just happened to my Ranger, and I'll probably be buying a BBK replacement soon. __________________ 1999 Explorer XLT 4dr, 4.0L-SOHC, 5R55E Auto, A4WD K&N FIPK Cold Air--XCAL3 w/ custom tunes from Henson Performance On The Way: Gibson Cat-Back,U/D pulley,Professional Products Polished 70mm Throttle Body **Planned soon:80mm MAFS,Removal of the Cats,Electric Fan Best Time 15.87 e/t @ 86.6MPH in the 1/4

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07-09-2012, 08:06 AM	#3
danny910 Wannabe Elite Explorer Dunn N.C. 93' SPLASH Join Date: Mar 2009 Posts: 17 Vehicle Specs (Original Poster)	no none at all.

07-09-2012, 08:57 AM	#4
danny910 Wannabe Elite Explorer Dunn N.C. 93' SPLASH Join Date: Mar 2009 Posts: 17 Vehicle Specs (Original Poster)	going to try to reset my emc to see if that helps any. will post results

07-09-2012, 09:53 PM	#5
danny910 Wannabe Elite Explorer Dunn N.C. 93' SPLASH Join Date: Mar 2009 Posts: 17 Vehicle Specs (Original Poster)	reset emc but very little difference