Idle engine speed. - Land Rovers Only

Militant-Grunt · 01-05-2006, 05:34 PM

What is the idle engine speed supposed to be? Mine fluctuates a lot, it feels like the car is going to stall, it shakes and studders, I had this problem for about a year now, it has stalled on me in traffic before I have no idea what is is.

My idle speed is in the middle of the thin line and the thick line on the rev counter. (The thick line being the one above the zero) The car has about 96k miles on it now, I ran fuel injector cleaner, and a oil additive to see if it would cure it. It didnt. When the tranny is in neutral or park the idle is on the thin line below 1k rpm. Some one told me to clean the stepper motor (I have no idea where it is or how to clean it. Any ideas? Help

DISCO INCUBUS · 01-05-2006, 06:23 PM

Quote:

Originally Posted by Militant-Grunt

What is the idle engine speed supposed to be? Mine fluctuates a lot, it feels like the car is going to stall, it shakes and studders, I had this problem for about a year now, it has stalled on me in traffic before I have no idea what is is.

My idle speed is in the middle of the thin line and the thick line on the rev counter. (The thick line being the one above the zero) The car has about 96k miles on it now, I ran fuel injector cleaner, and a oil additive to see if it would cure it. It didnt. When the tranny is in neutral or park the idle is on the thin line below 1k rpm. Some one told me to clean the stepper motor (I have no idea where it is or how to clean it. Any ideas? Help

Cleaning the stepper motor did not help mine i had to replace it.
Your truck has 96K , better off replacing it, it is located on the intake plenum.

With the hood open facing the engine the plenum is the part that has the engine size on it 3.9, 4.0 etc.. the stepper motor is on the left rear of the
plenum .

9dawgs · 01-05-2006, 08:19 PM

The Stepper Motor or Idle Control Valve will cost $300+ if purchase from a LR dealer. You can pick up an aftermarket part for under $50 if you know what you're looking for. I just bought a Borg Warner P/N 21774 for my '99 Disco with the 4.0L and it cost me $34.99 at Pep Boys Autoparts. If you have the 3.9L go to this site and find the alternate part http://www.rangerovers.net/discoparts/

Hope this helps.

Militant-Grunt · 01-05-2006, 08:41 PM

The circled area?

Do I need to take anything off or unscrew anything?

DISCO INCUBUS · 01-06-2006, 08:40 AM

Quote:

Originally Posted by Militant-Grunt

The circled area?

Do I need to take anything off or unscrew anything?

Your other left? Hit the deck and give me 25

me.guevara · 01-06-2006, 09:55 AM

The stepper motor shouldn't be screwed on too tightly, so most of the time you should be able to unscrew it with your hand (make sure to disconnect the wire harness first, though). The first time, it may be a bit stuck, so you may need a wrench.

To clean it, just unscrew it and wipe it down with a lint-free cloth (some folk use compressed air, too).

I've replaced mine with the AC Delco part - do a search on "stepper" or "idle air" here and check out the site that 9dawgs recommends, there's a ton of information.

Definitely sounds like that's the culprit, but there's some other causes, too. The idle air control valve is as good a place as any to start if you're not going to go for the expensive LR "genuine" replacement.

Good luck!

TsiArt · 01-06-2006, 10:56 AM

Wow . the same problem the DSM ( Dimond Star Mottors , aka T.E.L. Talon Eclipse Laser ) comunity has . I had that problem in my Talon too .

I find it funny actualy . How two different cars will have the same problem and symptoms .

Oh and the price is the same too . It's anywhere from $260 and up . but rebuild ones go for $130

DiscoPilot · 01-06-2006, 11:48 AM

Quote:

Originally Posted by TsiArt

Wow . the same problem the DSM ( Dimond Star Mottors , aka T.E.L. Talon Eclipse Laser ) comunity has . I had that problem in my Talon too .

I find it funny actualy . How two different cars will have the same problem and symptoms .

Oh and the price is the same too . It's anywhere from $260 and up . but rebuild ones go for $130

Tis true i have replaced at least 5 on DSM's in the past

apbtpetey · 01-06-2006, 04:53 PM

this part needs to replaced on alot of cars. i had to replace the one on my old Mark viii and just did the one on our escape.

I called the fod dealer and they wanted $500 to replace it on the escape. I asked what they were smoking becuase I got the part from them for $60 and it only took 2 mins to change.

Militant-Grunt · 01-06-2006, 09:31 PM

Thank you guys, I am going to go to a bunch of junk yards maybe find a low mileage Disco, it would be a heck of a lot cheaper. If not Strauss or Auto zone it is.

01-05-2006, 05:34 PM	#1 (permalink)
Militant-Grunt Senior Member Join Date: May 2005 Location: NYC Posts: 111 Gallery: 0	Idle engine speed. What is the idle engine speed supposed to be? Mine fluctuates a lot, it feels like the car is going to stall, it shakes and studders, I had this problem for about a year now, it has stalled on me in traffic before I have no idea what is is. My idle speed is in the middle of the thin line and the thick line on the rev counter. (The thick line being the one above the zero) The car has about 96k miles on it now, I ran fuel injector cleaner, and a oil additive to see if it would cure it. It didnt. When the tranny is in neutral or park the idle is on the thin line below 1k rpm. Some one told me to clean the stepper motor (I have no idea where it is or how to clean it. Any ideas? Help __________________ -Militant Grunt

01-05-2006, 08:19 PM	#3 (permalink)
9dawgs JesusIsLord Join Date: Jun 2005 Location: Tampa, FL Posts: 173 Gallery: 2	The Stepper Motor or Idle Control Valve will cost $300+ if purchase from a LR dealer. You can pick up an aftermarket part for under $50 if you know what you're looking for. I just bought a Borg Warner P/N 21774 for my '99 Disco with the 4.0L and it cost me $34.99 at Pep Boys Autoparts. If you have the 3.9L go to this site and find the alternate part http://www.rangerovers.net/discoparts/ Hope this helps. __________________ 9dawgs '99 Discovery I '99 Chevy Astro 4X2 w/4" Lift (family truckster) 17' Basstracker w/40HP Mercury 11' Jon Boat w/numerous antique outboards

01-05-2006, 08:41 PM	#4 (permalink)
Militant-Grunt Senior Member Join Date: May 2005 Location: NYC Posts: 111 Gallery: 0	The circled area? Do I need to take anything off or unscrew anything? __________________ -Militant Grunt

01-06-2006, 09:55 AM	#6 (permalink)
me.guevara MG Join Date: Aug 2005 Location: Bolivia Posts: 720 Gallery: 0	The stepper motor shouldn't be screwed on too tightly, so most of the time you should be able to unscrew it with your hand (make sure to disconnect the wire harness first, though). The first time, it may be a bit stuck, so you may need a wrench. To clean it, just unscrew it and wipe it down with a lint-free cloth (some folk use compressed air, too). I've replaced mine with the AC Delco part - do a search on "stepper" or "idle air" here and check out the site that 9dawgs recommends, there's a ton of information. Definitely sounds like that's the culprit, but there's some other causes, too. The idle air control valve is as good a place as any to start if you're not going to go for the expensive LR "genuine" replacement. Good luck! __________________ ________________________ MG '95 Disco I, 3.9L V8i 5-speed Discoverying Bolivia...

01-06-2006, 10:56 AM	#7 (permalink)
TsiArt Polish and proud of it. Join Date: May 2005 Location: East Haven, CT Posts: 613 Gallery: 0	Wow . the same problem the DSM ( Dimond Star Mottors , aka T.E.L. Talon Eclipse Laser ) comunity has . I had that problem in my Talon too . I find it funny actualy . How two different cars will have the same problem and symptoms . Oh and the price is the same too . It's anywhere from $260 and up . but rebuild ones go for $130 __________________ I'm a Proud owner of a vehicle that has a turning Radius of 747 Check out our Frappr! Myspace ? It dose not mather who votes, only matters who counts the votes _ Krushchew

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01-06-2006, 04:53 PM	#9 (permalink)
apbtpetey Support Our Troops Join Date: Jan 2005 Location: Hudson Valley, NY Posts: 3,419 Gallery: 0	this part needs to replaced on alot of cars. i had to replace the one on my old Mark viii and just did the one on our escape. I called the fod dealer and they wanted $500 to replace it on the escape. I asked what they were smoking becuase I got the part from them for $60 and it only took 2 mins to change. __________________ John Conklin LRO Moderator

01-06-2006, 09:31 PM	#10 (permalink)
Militant-Grunt Senior Member Join Date: May 2005 Location: NYC Posts: 111 Gallery: 0	Thank you guys, I am going to go to a bunch of junk yards maybe find a low mileage Disco, it would be a heck of a lot cheaper. If not Strauss or Auto zone it is. __________________ -Militant Grunt

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