Code 48 - Stepper Motor - Idle control - fix - Defender Source
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Old January 6th, 2014, 06:59 PM
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Daniel Hayes
1994 Defender 90 Soft Top
Join Date: Aug 2005
Location: Boulder, CO
Posts: 128
Code 48 - Stepper Motor - Idle control - fix

The stepper motor is the idle speed control device that is screwed into the left rear of the intake plenum - as you face the engine. I removed it and briefly sprayed carb cleaner into the business side of it - past the seat and spring. This was followed up by setting it on end and spraying it full of WD40, letting it sit for a bit. After refitting it with a makeshift gasket and a few drops of blue-medium- Locktite, short of the first start-up, it has worked flawlessly….knock on wood.

I believe that little bugger cost approximately $150.00!

94D90 NAS 3.9 LT77 LT230T Soft Top

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Old January 6th, 2014, 07:22 PM
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The Dro
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1988 Ninety
Join Date: Jan 2010
Location: Annandale, VA
Posts: 6,384
You can buy it for a lot less.

Go to Autozone and look for this: Duralast AC102. It's $55.
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Originally Posted by MonLand View Post
Online speculation will not replace onsite inspection.
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Old January 7th, 2014, 08:26 PM
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Justin Tebbenkamp
95 D-90 ST
Join Date: May 2008
Location: Blacksburg, VA, USA
Posts: 262
Has anybody else used this stepper motor?
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Old January 7th, 2014, 08:53 PM
Grover's Avatar
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Birmabright Bread Box/Swagger Wagon
Join Date: Dec 2005
Location: Under the bonnet
Posts: 1,670
I bought a stepper motor from pep boys for $15
Same stepper as used on the Chevy astrovan.
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Old January 7th, 2014, 09:52 PM
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1995 SW #487/500
Join Date: Sep 2003
Location: The Old North State
Posts: 7,406
the range rover has one from autozone, idles fines when it warms up. d90 is still on its factory stepper at 88k
Poor gas mileage gets you to the best places on earth
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