Weak Idle - Defender Source
Defender Source  

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


Reply
 
Thread Tools
  #1  
Old March 6th, 2008, 06:28 AM
saber6's Avatar
saber6
Status: Offline
gh
97 D90 SW
Member
 
Join Date: Sep 2005
Location: HMB, CA
Posts: 88
Weak Idle

My 1997 SW is picking of the sniffles, she runs superbly from start and and I have had no complaints for years now (she is a garage queen getting only 1k miles a year at best). However lately after she is warmed up and running I've noticed her idle gets very weak and accasionally stalls out. So bad so that I have to keep my foot on the gas to keep her rpm up to get through a stop light. After I shut her down for a while (maybe 30mins or more) she runs fine again until she heats back up.

I was thinking it could be bad gas, she does sit for long stretches but now I am thinking it may be something more. Let me know your thoughts and thank you very much. gh
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old March 6th, 2008, 08:03 PM
cgalpin's Avatar
cgalpin
Status: Offline
Charles Galpin
'94 D90 ST, '63 SeriesIIA
Site Team
 
Join Date: Jan 2004
Location: South Riding, VA
Posts: 11,625
Registry
If it really is just a low idle and nothing else seems to be affected, you can adjust the idle speed. If it has never been adjusted there is a little cap over the hole that you have to drill a hole in and pry it out (i'm told put a screw in it and pull). This is on top of the plenum where the air intake is.

Oh, this is on a 94, but I assume the 97 is the same.

charles
Reply With Quote
  #3  
Old March 6th, 2008, 08:42 PM
evilfij's Avatar
evilfij
Status: Offline
evilfij
I have never seen a rover in person
Member
 
Join Date: Oct 2003
Location: on the internet
Posts: 14,688
"you can adjust the idle speed"

DO NOT DO THIS!

You will mess up future diagnostics.

gh, do you get a check engine light?

As a start I would pull and clean the stepper motor. It could be a bunch of other things, but they are more time consuming and difficult to diagnose.
__________________
*not legal advice*
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old March 6th, 2008, 09:06 PM
huck1974's Avatar
huck1974
Status: Offline
shane cates
94 d90
Member
 
Join Date: Feb 2007
Location: springfield mo
Posts: 890
Quote:
Originally Posted by guajiro
My 1997 SW is picking of the sniffles, she runs superbly from start and and I have had no complaints for years now (she is a garage queen getting only 1k miles a year at best). However lately after she is warmed up and running I've noticed her idle gets very weak and accasionally stalls out. So bad so that I have to keep my foot on the gas to keep her rpm up to get through a stop light. After I shut her down for a while (maybe 30mins or more) she runs fine again until she heats back up.

I was thinking it could be bad gas, she does sit for long stretches but now I am thinking it may be something more. Let me know your thoughts and thank you very much. gh
Its not the fuel. Mine does the same thing every month or two.
__________________
I love little baby ducks, old pick-up trucks, slow-moving trains, and rain
I love little country streams, sleep without dreams, sunday school in may,
And hay
And I love you too
Reply With Quote
  #5  
Old March 6th, 2008, 10:16 PM
Grover's Avatar
Grover
Status: Offline
Mike
Birmabright Bread Box/Swagger Wagon
Member
 
Join Date: Dec 2005
Location: Cincinnati, Ohio
Posts: 1,856
Registry
Question

Could it be the Stepper Motor???
__________________
LR3 sidesteps with rocker panels for sale $400


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote
  #6  
Old March 7th, 2008, 12:45 AM
Hans's Avatar
Hans
Status: Offline
Hans Haase
The D-90.com Lab Rat
Member
 
Join Date: Oct 2003
Location: Long Island, NY
Posts: 2,381
I'm also on the list of suggesting checking the stepper motor.

If the idle is too low, the computer should automatically increase RPM's to compensate. If the idle is naturally too high, then you would manually adjust it down.

Could also be dirty oxygen sensors, but normally that would trip the check engine light. Don't have that on, do you?

One thing I do recommend in your case is to put some miles on it. If you're just doing a few short trips once in a while, and not letting it run at temperature very much, you're constantly running it in "warm-up" mode. When the engine is still warming up, it ignores most of the sensors and runs rich. If this is how the engine is running most of the time, you're going to clog up the cats eventually. So when you do drive it around, make sure to give it some good amount of time to run. This burns all that extra crap off your O2 sensors, out of the cats, and keeps the engine from gunking up.

-Hans
__________________
My oil line fix

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
My 100k stopped odometer fix

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Brace for impact, I'm in a "modifying mood". Massive thread count inbound.
Reply With Quote
  #7  
Old March 7th, 2008, 07:37 AM
cgalpin's Avatar
cgalpin
Status: Offline
Charles Galpin
'94 D90 ST, '63 SeriesIIA
Site Team
 
Join Date: Jan 2004
Location: South Riding, VA
Posts: 11,625
Registry
As far as the idle adjustment goes, count the turns and you can always revert. But Ron is probably right - mine has never been adjusted and doesn't appear to need it if everything else is working properly.

I agree with Hans - put some miles on it. My D90 had a weird stalling issue (but not an idle thing) and it went away after I put some miles on it. Prior to that I was just doing lots of short slow trips.
Reply With Quote
  #8  
Old March 7th, 2008, 10:35 AM
evilfij's Avatar
evilfij
Status: Offline
evilfij
I have never seen a rover in person
Member
 
Join Date: Oct 2003
Location: on the internet
Posts: 14,688
Also, much different on GEMS than 14CUX to adjust idle
__________________
*not legal advice*
Reply With Quote
Reply

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

Tags
idle

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 07:02 AM
fluctuating idle KeithElisa Defender Technical Discussions 15 May 31st, 2006 08:38 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 11:52 PM
d90 bogging & hesitating off idle vesparover Defender Technical Discussions 11 April 9th, 2004 04:03 PM


All times are GMT -5. The time now is 01:23 AM.


Copyright