Now it wont run at all - Page 2 - Defender Source
Defender Source  

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


Reply
 
Thread Tools
  #21  
Old May 26th, 2016, 06:25 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
Chicklet bad? Silver relays click? Did you try replacing them? What is the harness out of?
__________________
*not legal advice*
Reply With Quote
Sponsored Links
Advertisement
 
  #22  
Old May 26th, 2016, 06:32 PM
85Red110's Avatar
85Red110
Status: Offline
Kent
1985 110 3-door
Member
 
Join Date: Apr 2012
Location: Springfield, VA USA
Posts: 716
Registry
Quote:
Originally Posted by evilfij View Post
Chicklet bad? Silver relays click? Did you try replacing them? What is the harness out of?
Chicklet? Yes, both relays click. Not sure anymore what this system is out of. Paging Grumpy Bill....
__________________
1985 Land Rover 110 3-door ST
Reply With Quote
  #23  
Old May 26th, 2016, 06:49 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
Search chicklet and it will reveal where it is exactly. I forget at the moment, but they do cause issues.
__________________
*not legal advice*
Reply With Quote
Sponsored Links
Advertisement
 
  #24  
Old May 27th, 2016, 07:59 AM
Kevin88RRC's Avatar
Kevin88RRC
Status: Offline
Kevin Keith
1988 RRC
Member
 
Join Date: Dec 2014
Location: Portland, Maine
Posts: 1,045
Quote:
Originally Posted by 85Red110 View Post
Chicklet? Yes, both relays click. Not sure anymore what this system is out of. Paging Grumpy Bill....
Hope this helps....
http://www.defendersource.com/forum/...tml#post623617

Quote:
Originally Posted by leastonce View Post
The connection to the ECU is probably the problem.

It runs from the -ve side of the coil, via the chicklet near the MAF and onto the ECU. If this connection is problematic ( high resistance when damp ) then the ECU won't fire the injectors. They only get fired when the ECU gets this spark signal and knows the engine is therefore running.

This voltage should be about 9 volts. It's a pulse from the spark so easiest to test it with a probe with a light ... you should see it pulse with the engine running.

see 15 on the diagram ... it's a white wire with black tracer and goes to pin 39 on the ECU. The zigzag represents the chicklet resistor.
Reply With Quote
  #25  
Old May 27th, 2016, 09:18 AM
Davis's Avatar
Davis
Status: Offline
Chris Davis
94 NAS D90 6.2LS
Member
 
Join Date: Nov 2003
Location: Colorado
Posts: 2,505
My wife stalled lately so she gave me the D90 back, uncomfortable to drive it. It stalled on me several times and wouldn't restart for several minutes but then would. I checked the coil and get this--I was getting 12V on both sides of my ballast resistor. Truck wouldn't start. Then, while watching the voltage, the darn thing dropped down to 6V (on the coil side of the resistor) and then would start. ??? I replaced the ballast resistor, thinking internal short or something (I carry a spare) and same issue. Must be something in the coil. Replaced coil and truck started right up. Driving around, it stalled again and wouldn't start. At all. While turning it over, I heard a "spark" but it wasn't going. Turned out, when replacing the coil, the wire from the distributor to the coil wasn't plugged into the coil far enough. I had to push the wire further out of it's boot in order for it to go deep enough into the coil to make full contact. Not saying that is what you have, but it sure made my life difficult to diagnose. I now don't even know if my coil was bad or not, but at this point I don't mind having the 20 year old coil replaced so I am leaving it. It is a good reminder to make sure your coil wires stick far enough out of the boot---they may be far enough to transfer a spark under no-load but not enough to power the engine. Something worth checking. Good luck--this was just a shot in the dark.
Reply With Quote
  #26  
Old May 27th, 2016, 04:48 PM
85Red110's Avatar
85Red110
Status: Offline
Kent
1985 110 3-door
Member
 
Join Date: Apr 2012
Location: Springfield, VA USA
Posts: 716
Registry
Quote:
Originally Posted by evilfij View Post
Search chicklet and it will reveal where it is exactly. I forget at the moment, but they do cause issues.
My harness has no chicklet, tune resistor, ballast resistor, or anything of the like, anywhere along the harness, near the MAF or coil, or wherever. The truck ran last week just the way it is, albeit very shitty, then ran brilliantly with Lavs ECU, and now it wont do anything at all. The truck did nothing but sit in my garage between the test run with Lavs ECU, and then trying to start it again, with both ECU's I have now. All wire connections that I can test, have all tested good. Im lost.
__________________
1985 Land Rover 110 3-door ST
Reply With Quote
  #27  
Old May 29th, 2016, 10:46 AM
85Red110's Avatar
85Red110
Status: Offline
Kent
1985 110 3-door
Member
 
Join Date: Apr 2012
Location: Springfield, VA USA
Posts: 716
Registry
Yesterday, Galpin was kind enough to dig up a spare EFI harness out of his collection of parts, so that I could swap out mine and see if the issue was with the wiring. Turns out that Galpins harness is one that has the Tune Resistor on the wire that goes to the coil. For some reason, mine didn't have that resistor at all. I simply installed the resistor on my harness, and that did the trick.

Don't ask me how on earth the truck ran before without it.

Many thanks to all the members here for their advice, and to Charles for letting me cut his resistor out of his spare harness
__________________
1985 Land Rover 110 3-door ST
Reply With Quote
  #28  
Old May 29th, 2016, 10:50 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
Weird. Rest of world harness maybe.
__________________
*not legal advice*
Reply With Quote
  #29  
Old May 29th, 2016, 11:22 AM
roverman2010's Avatar
roverman2010
Status: Offline
John
1985 LR 90 200Tdi
Member
 
Join Date: Sep 2011
Location: Galveston Island, NearTexas
Posts: 2,329
Registry
Tune Resistor

A Tune Resistor was originally specified in the wire harness so that one ECU part number could serve multiple vehicle markets. (Multiple computer programs could be stored within the ECU, and the ECU could "decide" which one to use based on what resistance it sensed.) One leg of the Tune Resister was wired to terminal 5 of the ECU, and the other leg was spliced to ground.

At some point during 14CUX production, Rover apparently decided to eliminate the Tune Resistor. (According to Rover service literature, this started with VIN number LA451517.) It isn't clear from the literature whether any US-market 14CUX systems would be effected by having an incorrect or damaged tune resister. The example system we photographed and described for this article NEVER HAD A TUNE RESISTOR!

The following information on Tune Resistors is based on Rover service literature.

Visual inspection of wire color codes will allow you to quickly differentiate between resistors.
White 3900 Ohms USA and European vehicles with catalytic converters
Green 470 Ohms UK and European vehicles without catalytic converters
Yellow 910 Ohms Saudi vehicles (without catalytic converters.)
Red 180 Ohms Australia and "the rest of the world."

Note: all four types of Rover Tune Resistors were rated for 0.5 Watts.

When fitted, the Tune Resistor was connected to the ECU through terminal position 5, and it was also connected to terminal position 27 through a splice. If you wish to check the resistor, first disconnect power to the system, second disconnect the EFI Cable Harness Assembly from the ECU, and finally simply measure resistance (using an Ohmmeter) from pin 5 to pin 27 on the main ECU connector. (Resistance isn't polarity dependent.)
__________________
Edward Teach is the Blackbeard, and is a member of the Birmabright Brotherhood.

Still looking for that place where I can carry a paddle and get asked what's that.

JnK Services
FC101 GS FFR
57 LR 88" SXF 858
85 LR90
95 D1 Tdi
05 D3 HSE
97 XK8 BRG FHC For Sale
Reply With Quote
  #30  
Old May 29th, 2016, 11:58 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
Thank Carlos for the harness. Like half the shit I hoard it was not needed but was intended to make a "pegboard" 14cux system so I can play around with making a android or iOS version of rovergauge one day
__________________
Quote:
Originally Posted by pendy
I'm here for the D's
Reply With Quote
  #31  
Old May 29th, 2016, 12:05 PM
roverman2010's Avatar
roverman2010
Status: Offline
John
1985 LR 90 200Tdi
Member
 
Join Date: Sep 2011
Location: Galveston Island, NearTexas
Posts: 2,329
Registry
I want to correct some bad info that was included in a post above.

pin 39 White/Black wire from the neg side of the coil, this is the Engine speed signal cable (harness includes 6.8k ohm resistor) THIS NOT A TUNE RESISTOR.
__________________
Edward Teach is the Blackbeard, and is a member of the Birmabright Brotherhood.

Still looking for that place where I can carry a paddle and get asked what's that.

JnK Services
FC101 GS FFR
57 LR 88" SXF 858
85 LR90
95 D1 Tdi
05 D3 HSE
97 XK8 BRG FHC For Sale
Reply With Quote
  #32  
Old May 29th, 2016, 01:40 PM
Kevin88RRC's Avatar
Kevin88RRC
Status: Offline
Kevin Keith
1988 RRC
Member
 
Join Date: Dec 2014
Location: Portland, Maine
Posts: 1,045
Quote:
Originally Posted by roverman2010 View Post
I want to correct some bad info that was included in a post above.

pin 39 White/Black wire from the neg side of the coil, this is the Engine speed signal cable (harness includes 6.8k ohm resistor) THIS NOT A TUNE RESISTOR.
If you are referring to my repost of info.... it is correct info because we were discussing the 'chicklet' (the 6.8k resistor you referenced). It was not about the tuner resistor.


Kent: which tune resistor & which ECU? I still recommend running the complete EFI test sheet if you haven't.
Reply With Quote
  #33  
Old May 29th, 2016, 03:26 PM
sonoronos's Avatar
sonoronos
Status: Online
Ed
None
Member
 
Join Date: May 2010
Location: Arlington, VA
Posts: 5,537
Registry
Quote:
Originally Posted by 85Red110 View Post
Yesterday, Galpin was kind enough to dig up a spare EFI harness out of his collection of parts, so that I could swap out mine and see if the issue was with the wiring. Turns out that Galpins harness is one that has the Tune Resistor on the wire that goes to the coil. For some reason, mine didn't have that resistor at all. I simply installed the resistor on my harness, and that did the trick.

Don't ask me how on earth the truck ran before without it.

Many thanks to all the members here for their advice, and to Charles for letting me cut his resistor out of his spare harness
Awesome work! Thanks for sharing the solution
Reply With Quote
  #34  
Old May 29th, 2016, 04:37 PM
carlosz's Avatar
carlosz
Status: Offline
Carlos
frank stein "frankie" in action RIP
Member
 
Join Date: Jun 2006
Location: east coast
Posts: 962
Registry
Quote:
Originally Posted by cgalpin View Post
Thank Carlos for the harness. Like half the shit I hoard it was not needed but was intended to make a "pegboard" 14cux system so I can play around with making a android or iOS version of rovergauge one day
no thanks needed, glad to be of service.
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
Changed head gasket now TDI wont start RiftRover Defender Technical Discussions 10 April 3rd, 2015 03:29 PM
So now that Dash Bezel is NLA, what are we to do now? Neil McCauley Misc. Chit-Chat 7 October 9th, 2009 07:51 PM
Just did an engine swap and now wont run... RyanB16 Defender Technical Discussions 16 March 4th, 2009 11:29 AM
Wont run at temp Neo Defender Technical Discussions 12 February 24th, 2006 06:54 PM
changed cam, all gaskets and now it won't run vesparover Defender Technical Discussions 4 July 24th, 2005 09:56 PM


All times are GMT -5. The time now is 07:45 AM.


Copyright