Idle Issue - Defender Source
Defender Source  

Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions

Join the Defender Source Community Today

Thread Tools
Old April 19th, 2006, 11:03 AM
saber6's Avatar
Status: Offline
97 D90 SW
Join Date: Sep 2005
Location: HMB, CA
Posts: 88
Question Idle Issue

I started my 97 D90 SW up last weekend (first crank up in about three weeks) and everything sounded normal. I did have to jump it because a stinger flashlight cradle will drain it down sometimes. Typically I let it warm up for about 5mins and jump in and go. But I quickly noticed something was not right. This is what happened: After the truck idled warm I placed it in Reverse to back out of the driveway and the idle spiked to around 2200-2500 rpms, I quickly hit the brake to stop from moving into the street so quickly and as fast as the rpm's went up it went back down to normal idle. I placed it in Drive the same thing happened. I drove it around the block a couple of times and the problem persisted, it neither got worse or better. Back in my garage with the truck in park and the hood up I pulled the accelerator line above the intake (only slightly, just a touch) and the idle on its own raised to 2200-2500 slowly like it had done before and slowly went back down to normal idle. I shut it down and let it be for a couple of days or so and started it back up to see if the problem persisted, and it didn't, now it drives/idles/ etc..., as it always had. I think I have an idea on why that happened but would like to know what you guys think. Please let me know your thoughts and thank you very much. gh

Reply With Quote
Old April 19th, 2006, 12:02 PM
Mike Hippert's Avatar
Mike Hippert
Status: Offline
94 D-90 Grinding Rover
Join Date: Sep 2003
Location: Manchester NH USA
Posts: 4,790
Was it a full moon?

Just kidding. Could be allot of things, but most likely it had not been driven for a while and maybe the stepper is a little dirty so it got stuck, after the second restart is became unstuck and is now fine? But it could be allot of things.

Don't forget to Search first then ask questions later! The loose nut behind the wheel
Reply With Quote
Old April 19th, 2006, 12:25 PM
Hans's Avatar
Status: Offline
Hans Haase
The Lab Rat
Join Date: Oct 2003
Location: Long Island, NY
Posts: 2,385
My guess is that with the battery totally dead, the ECU lost all it's memorized settings on the engine and had to re-learn everything from scratch. Same thing happens to the older trucks too if you disconnect the battery or ECU. Nothing unusual or bad, just part of the process inside the computer.

My oil line fix

My 100k stopped odometer fix

Brace for impact, I'm in a "modifying mood". Massive thread count inbound.
Reply With Quote

Lower Navigation
Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Fault Code 48/fast engine idle speed arbik Defender Technical Discussions 9 June 2nd, 2006 06:02 AM
fluctuating idle KeithElisa Defender Technical Discussions 15 May 31st, 2006 07:38 AM
High Idle tron Defender Technical Discussions 5 February 15th, 2006 03:33 PM
Code 48: Base Idle Speed? thug1313 Defender Technical Discussions 2 April 29th, 2005 10:52 PM
95 won't start, possible fuel priming issue? jcasteel Defender Technical Discussions 1 March 15th, 2005 09:45 AM

All times are GMT -5. The time now is 06:39 AM.