One for the EXPERTS - Page 2 - Defender Source
Defender Source  

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


Reply
 
Thread Tools
  #21  
Old June 19th, 2009, 04:05 PM
texmoto
Status: Offline
david summers
99 Discovery II
Member
 
Join Date: Aug 2007
Location: fort worth, tx usa
Posts: 109
Ok. Only way to test it is to drive around and wait and see if it dies when it gets hot.
Reply With Quote
Sponsored Links
Advertisement
 
  #22  
Old June 19th, 2009, 04:18 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
Quote:
Originally Posted by ECR
That would be my guess if you have replaced the ign. module already.
Often overlooked part, but does exactly what you say is happening.
Wow, Mike agreed with me. I should buy stuff from him more often.

Near the MAF on the harness there is an area where it buldges that is wrapped in black electrical tape. When you undo the tape, you will see a (my LWB has two for some unknown reason) little black square thing about the size of a dime. Remove it and replace it. Not sure what it is called, but I was told it is some sort of resistor.
__________________
*not legal advice*
Reply With Quote
  #23  
Old June 19th, 2009, 04:29 PM
texmoto
Status: Offline
david summers
99 Discovery II
Member
 
Join Date: Aug 2007
Location: fort worth, tx usa
Posts: 109
Uh, not to be difficult, but I think I'm going to need a part name or number, though the local independant rover shop is pretty friendly.
Reply With Quote
Sponsored Links
Advertisement
 
  #24  
Old June 19th, 2009, 04:37 PM
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
Ahhhh, I know what piece you mean now. Not in the book unfortunately, so I can't provide a part number for it.

-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
  #25  
Old June 19th, 2009, 06:04 PM
texmoto
Status: Offline
david summers
99 Discovery II
Member
 
Join Date: Aug 2007
Location: fort worth, tx usa
Posts: 109
Any idea where I can buy this thing. Mind you, I have yet to find it on mine.
Reply With Quote
  #26  
Old June 19th, 2009, 07:00 PM
ECR's Avatar
ECR
Status: Offline
East Coast Rover Co.
Just Defenders, nothing else.
D-90 Source Vendor
 
Join Date: May 2006
Location: Rockland, ME, USA
Posts: 4,614
Quote:
Originally Posted by evilfij
Wow, Mike agreed with me. I should buy stuff from him more often.
hey, when you are right you are right.


I recall when we first found this issue years ago. If we ran the truck that had the hot stalling issue in the shop with the hood up, it cooled that thing just enough to not stall. If you rev'd the engine the fan would push just enough air across it to make it not stall. It took forever to figure out the first time. Run it on the road with the hood closed and then it would stall. Let it cool off, it starts and runs fine, for about 10 minutes until the heat builds.
Then we started messing about with a fan in the engine bay and it would stay running. Close the hood and trap the heat in and it would stall. Finally figured it out and duplicated it with a heat gun on the little resistor. It was a f8cker to find.
I can't tell you how many 90s come to us with "I just replaced everything in the ignition and it still stalls... you fix it". 2 minutes later... problem solved.
__________________
Email:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

I do not check PMs. Call or email if you need something.

ECR is not a parts source. We are not in the mail order business.
Reply With Quote
  #27  
Old June 19th, 2009, 10:07 PM
texmoto
Status: Offline
david summers
99 Discovery II
Member
 
Join Date: Aug 2007
Location: fort worth, tx usa
Posts: 109
well, I still need to know where to buy one. mine was corroded. cleaned the spade connectors. . . . and the problem is still there. the part says Lucas RD 953066.
Reply With Quote
  #28  
Old June 20th, 2009, 12:25 AM
cellulararrest's Avatar
cellulararrest
Status: Offline
Chris Snyder
1994 D90 #614 | '07 L322 SC
Member
 
Join Date: Feb 2006
Location: Newburyport, MA
Posts: 1,544
Mike did you figure out how this little guy causes such a problem? I thought it was just a resistor in a small circuit providing the ECU engine speed info.I think it was around 7k ohms or something? Have you checked them to see if they're off or how they fail and why it messes with the idle?
Reply With Quote
  #29  
Old June 20th, 2009, 12:04 PM
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
The ECU is only connected to the ignition system via that one wire, which provides the tach feed. Sure they may share a few other wires in the 12v supply, but that is the only SIGNAL passing between the two. This is also why the diagnostic display doesn't have any ignition related trouble codes.

If that resistor fails, at idle the ECU would sense no throttle input and no RPM. Add in when you're coasting to a stop, where the air cuts back naturally anyway, and you're adding O2 sensors reading lean too. The ECU would most likely think the engine has shut down, and thus cut off all fuel at that point. Since the fuel system technically didn't have anything else wrong, there would be no trouble code.

I am curious though if/how it could case a no-spark situation.

-Hans

Follow-up Post:

I wonder if there is an off the shelf option here, if it's just a resistor. Anybody cut one open yet to confirm it?
__________________
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
  #30  
Old June 20th, 2009, 12:56 PM
texmoto
Status: Offline
david summers
99 Discovery II
Member
 
Join Date: Aug 2007
Location: fort worth, tx usa
Posts: 109
Does anyone have any idea where to get this freaking part? Or anything close to it?
Reply With Quote
  #31  
Old June 20th, 2009, 01:36 PM
phoenix37's Avatar
phoenix37
Status: Offline
john
97 D90 ST / 1957 S1 109/ 1983 LS110
Member
 
Join Date: Feb 2008
Location: Venice, CA/Yarmouth,ME
Posts: 5,782
Registry
http://www.britishv8.org/Articles/Rover-14CUX-EFI.htm

If you scroll down this should give you a little more info on what this resistor does it may help with your search. Maybe a radio shack or something like that will have a resistor that provides a similar amount of resistance. Are you still stuck away from home? Im in So cal and have an RRC sitting in the driveway I could canabalize at least until you get home.
Reply With Quote
  #32  
Old June 20th, 2009, 01:42 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
www.roverguy.com will have it used.
__________________
*not legal advice*
Reply With Quote
  #33  
Old June 20th, 2009, 01:47 PM
texmoto
Status: Offline
david summers
99 Discovery II
Member
 
Join Date: Aug 2007
Location: fort worth, tx usa
Posts: 109
Thanks for the link. And thanks for the offer John, but I did make it home. But kind of you to offer. Radio Shack, Frys, ect have nothing like this kind of resistor (i.e. encased, heat resistant). Will try matching it at Car Quest on Monday (working 24 hrs. today).
Reply With Quote
  #34  
Old June 20th, 2009, 01:52 PM
phoenix37's Avatar
phoenix37
Status: Offline
john
97 D90 ST / 1957 S1 109/ 1983 LS110
Member
 
Join Date: Feb 2008
Location: Venice, CA/Yarmouth,ME
Posts: 5,782
Registry
No problem. I was worried you and your son were stuck at some truck stop trying to get home.
Reply With Quote
  #35  
Old June 20th, 2009, 07:08 PM
cellulararrest's Avatar
cellulararrest
Status: Offline
Chris Snyder
1994 D90 #614 | '07 L322 SC
Member
 
Join Date: Feb 2006
Location: Newburyport, MA
Posts: 1,544
I'll have to keep this one in the back of my mind for the future.
Reply With Quote
  #36  
Old June 20th, 2009, 10:22 PM
JRW's Avatar
JRW
Status: Offline
John
94 D90 ST #1247
Member
 
Join Date: Jun 2008
Location: Flower Mound, TX
Posts: 253
Quote:
Originally Posted by phoenix37
Wow. This is a great resource on the 3.9 Rover engine bits.
Reply With Quote
  #37  
Old June 21st, 2009, 12:57 AM
kellymoe's Avatar
kellymoe
Status: Offline
kevin
defender 130
Member
 
Join Date: Oct 2003
Location: burbank california
Posts: 967
Registry
I had a problem with stalling years ago in my 88 Range Rover Classic. It turned out to be the stepper motor at the back of the plenum. I took it out and cleaned it with solvent and it helped but it still lugged a bit. When I bought a new stepper motor it solved the problem. There is another name for the stepper motor but I cant think of it at the moment, oh wait it's the idle air bypass.

Here is a link to a guy that was having similar issues.
http://landroverforums.com/forum/showthread.php?t=2157
Reply With Quote
  #38  
Old June 21st, 2009, 12:31 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
Idle Air Control Valve is also another name for a stepper motor (only the brits call it a stepper motor).
__________________
*not legal advice*
Reply With Quote
  #39  
Old June 21st, 2009, 12:52 PM
kellymoe's Avatar
kellymoe
Status: Offline
kevin
defender 130
Member
 
Join Date: Oct 2003
Location: burbank california
Posts: 967
Registry
Quote:
Originally Posted by evilfij
Idle Air Control Valve is also another name for a stepper motor (only the brits call it a stepper motor).
Thats it thanks. Seems there were lots of people having problems with these things a years back, dont seem to hear much issues with them anymore.
Reply With Quote
  #40  
Old June 21st, 2009, 03:34 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
I have a code 48 now if it makes you feel better. I need to reset my base idle as it is clearly been tampered with by a so called "expert" before I conclude it is the stepper (swapping and cleaning did not help it).

Ron
__________________
*not legal advice*
Reply With Quote
Reply

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
Question for the LR Color experts RiftRover Defender Technical Discussions 13 September 4th, 2009 12:38 PM
Winch...panel of experts Overland90 Defender Technical Discussions 23 January 30th, 2009 12:15 PM
Calling all experts! Emerson00 Defender Technical Discussions 11 May 16th, 2008 02:09 PM
Off Road Training weekend - Overland Experts in CT 3/29 & 3/30 pmd Trips, Trails and Events 2 March 19th, 2008 08:05 AM
Overland Experts - winter drving.... dmarchand Trips, Trails and Events 5 October 2nd, 2007 05:02 PM


All times are GMT -5. The time now is 08:39 AM.


Copyright