My lifters are noisy only when accelerating
Camel Trophy
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Rock Crawling
Joined: Aug 2015
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From: Texas
Hey, Fedex arrive late yesterday. Known good coil and amplifier. Still no start. Have to run through the tests again. did test from positive battery to negative coil and that problem is now correct. The last time this happened it was some spade connectors that are in the coil wiring. Still have no idea what they are and don't have any extra. Also got a timing light in Fedex shipment.
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Rock Crawling
Joined: Aug 2015
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From: Texas
I will be figuring out what those connectors are. I have gut feeling its those or timing. Need direction on timing testing while engine is not starting
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Rock Crawling
Joined: Aug 2015
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From: Texas
Here is the info on the connectors: should I remove them? This is the connector 5 yrs ago I replaced and the truck started right up...not that that is the issue this time.
THERE ARE TWO OF THESE:
ONE THE NEGATIVE SIDE OF THE COIL
ONE ON THE POSITIVE SIDE OF THE COIL
I Googled - lucas 953066 -
Reading this thread it appears to be an engine speed sense resistor.
http://www.landrover...resistor-31283/
I've plucked the 'best post' from the thread.
Quote
From a great article on the 14CUX system (Rover 14CUX Hot Wire Mass Flow EFI: Service and Troubleshooting) here is what a tune resistor is:
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.)
Here is the resistor I think Ian may have been talking about near the ECU:
When visually inspecting the EFI Cable Harness Assembly, one unusual component that's particularly conspicuous is the resistor that Rover included on the Engine Speed sense circuit. This resistor should NOT be confused with the Tune Resistor. This circuit is the only connection between the ignition system and the fuel injection system. A damaged or loosely connected resistor would likely result in an open circuit, leaving the ECU wondering about engine speed.
In our example system this resistor is marked "Lucas", "RD953066", "83630A", and "892Q". The resistor should provide about 6.8k Ohm resistance.
THERE ARE TWO OF THESE:
ONE THE NEGATIVE SIDE OF THE COIL
ONE ON THE POSITIVE SIDE OF THE COIL
I Googled - lucas 953066 -
Reading this thread it appears to be an engine speed sense resistor.
http://www.landrover...resistor-31283/
I've plucked the 'best post' from the thread.
Quote
From a great article on the 14CUX system (Rover 14CUX Hot Wire Mass Flow EFI: Service and Troubleshooting) here is what a tune resistor is:
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.)
Here is the resistor I think Ian may have been talking about near the ECU:
When visually inspecting the EFI Cable Harness Assembly, one unusual component that's particularly conspicuous is the resistor that Rover included on the Engine Speed sense circuit. This resistor should NOT be confused with the Tune Resistor. This circuit is the only connection between the ignition system and the fuel injection system. A damaged or loosely connected resistor would likely result in an open circuit, leaving the ECU wondering about engine speed.
In our example system this resistor is marked "Lucas", "RD953066", "83630A", and "892Q". The resistor should provide about 6.8k Ohm resistance.
Last edited by Roverfanatic; Jan 2, 2016 at 02:57 PM.
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Rock Crawling
Joined: Aug 2015
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From: Texas
This seems to speak even more to my model:
Lucas RD 953066 Resistor fitted to coil. Do I need it ?
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Lucas RD 953066 Resistor fitted to coil. Do I need it ?
Postby Jeepster » Thu 24 Feb 2011 9:14 pm
Image
I have found while fitting the coil wires back, found a small black square plactic item, see picture, with Lucas RD 953066 stamped on it. The engine is a 3.5 EFI Flapper type. Looks like it was fitted to the negative side of the coil, not sure what lead it came off though, new coil was fitted last year ?
Having done a bit of research it appears to be a resistor, do not know if it should be there and what it does being connected on the negative side of the coil ?
Last edited by Jeepster on Fri 25 Feb 2011 11:57 pm, edited 1 time in total.
Sometimes it's the getting there that can be as much fun as being there. Begin the journey.......
3.5 V8 EFI Flapper - 1988 - 2" Lift Custom - 31X10.5.X15 AT2s - Attitued of a Camel
This vehicle has not been named.............yet! It frequently gets called every thing under the sun
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Re: Lucas RD 953066 Resistor fitted to coil. Do I need it ?
Postby Trev. » Thu 24 Feb 2011 10:26 pm
It should be on the white/black lead that feeds the ECU with an ignition signal. Leaving it off risks damaging the ECU.
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Lucas RD 953066 Resistor fitted to coil. Do I need it ?
Postby Jeepster » Fri 25 Feb 2011 11:44 pm
Hi Cruiser - Thanks for your feedback. Done a bit more digging. There is a blue and white wire, this comes from the ShutOff Relay, that is connect to the negative terminal along with the black and white wire from the dizzy pack.
Apparently the ECU uses it to sense the coil voltage and adjusts accordingly ? Not sure if that is correct, but I think it stops the coil from being over loaded ?
On the Lucas coil, this has a female spade to connect the resistor on the neg side, on my replacement coil this is not present. I think this is why it was missed, I have fitted the resistor, and will see what happens tomorrow. Land Rover still do the part. Part No. DRC1752L - Rimmers do it to but only worth ordering if you want other part as same price as Land Rover dealership. Land Rover of course do not have to post it.
Rimmers also do the Lucas Coil too Ignition Coil - Replacement for Lucas Type - Aftermarket at www.rimmerbros.co.uk
Most information on line refers to the 14CUX ECU where the same resisistor is used in the ECU harness and has a different use.
Last edited by Jeepster on Fri 04 Mar 2011 10:10 pm, edited 3 times in total.
Sometimes it's the getting there that can be as much fun as being there. Begin the journey.......
3.5 V8 EFI Flapper - 1988 - 2" Lift Custom - 31X10.5.X15 AT2s - Attitued of a Camel
This vehicle has not been named.............yet! It frequently gets called every thing under the sun
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Re: Lucas RD 953066 Resistor fitted to coil. Do I need it ?
Postby Trev. » Sat 26 Feb 2011 1:28 am
You don't actually have a coil pack with that ECU as it has a non-managed ignition system. It's just looking for a pulse from the coil to determine that the engine is running. If it detects the engine is not running it shuts down the injection system. This is so that if the vehicle is in a crash and the engine stalls the fuel pump will not try and supply high pressure fuel to what may be a ruptured fuel line. I believe the resistor is there as a spike protector.
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Re: Lucas RD 953066 Resistor fitted to coil. Do I need it ?
Postby Jeepster » Mon 28 Feb 2011 8:00 pm
Thanks Cruiser - I connected it up to black and white lead going to the neg side of coil, and the engine did not start, took out the RD 953066 and engine started.
I had a look at the drawings and the workshop manual, Section 19 Page 13. The earlier drawings show '86 models had the resistor connected to the black and white wire. The 1988 drawings show the connections as the white lead with the blue tracer, coming from the ShutOff Relay.
The WSM shows the resistor, it as a 6.8 ohm resistor. There is also a test procedure for this shown. I wired the connection up making a mini harness to do it, due to the lack of a female spade terminal on the coil. Reconnected battery and engine started fine. Will see if effects cold start tommorow.
Intresting you say the RD was used being a "spike resistor", seems this is what was used on ECU on Hot Wire a mentioned earlier, though the location of the resistor is different.
Sometimes it's the getting there that can be as much fun as being there. Begin the journey.......
3.5 V8 EFI Flapper - 1988 - 2" Lift Custom - 31X10.5.X15 AT2s - Attitued of a Camel
This vehicle has not been named.............yet! It frequently gets called every thing under the sun
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Lucas RD 953066 Resistor fitted to coil, and cold starting..
Postby Jeepster » Mon 14 Mar 2011 11:08 pm
Well I fitted the resistor and checked voltage, etc, fine, however made not a bit of difference to starting.
It is the first three or four minutes before the Extra Air widget kicks in, and the revs go up. Once the valve opens up, it is fine. I checked the AFM seems ok. In advertently I had forgotten to do up the "jubilees" on the hose from the AFM to throttle opening on the plen. This resulted in no starting problem ? I tighten them up and I was back to the cold start issue.
I am wondering if it a problem either the "No2" Temp Sensor or Thermotime sensor ? Continued on new thread.....
Lucas RD 953066 Resistor fitted to coil. Do I need it ?
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6 posts • Page 1 of 1
Lucas RD 953066 Resistor fitted to coil. Do I need it ?
Postby Jeepster » Thu 24 Feb 2011 9:14 pm
Image
I have found while fitting the coil wires back, found a small black square plactic item, see picture, with Lucas RD 953066 stamped on it. The engine is a 3.5 EFI Flapper type. Looks like it was fitted to the negative side of the coil, not sure what lead it came off though, new coil was fitted last year ?
Having done a bit of research it appears to be a resistor, do not know if it should be there and what it does being connected on the negative side of the coil ?
Last edited by Jeepster on Fri 25 Feb 2011 11:57 pm, edited 1 time in total.
Sometimes it's the getting there that can be as much fun as being there. Begin the journey.......
3.5 V8 EFI Flapper - 1988 - 2" Lift Custom - 31X10.5.X15 AT2s - Attitued of a Camel
This vehicle has not been named.............yet! It frequently gets called every thing under the sun
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Jeepster
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Re: Lucas RD 953066 Resistor fitted to coil. Do I need it ?
Postby Trev. » Thu 24 Feb 2011 10:26 pm
It should be on the white/black lead that feeds the ECU with an ignition signal. Leaving it off risks damaging the ECU.
Same Nightmare, Different Day
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Lucas RD 953066 Resistor fitted to coil. Do I need it ?
Postby Jeepster » Fri 25 Feb 2011 11:44 pm
Hi Cruiser - Thanks for your feedback. Done a bit more digging. There is a blue and white wire, this comes from the ShutOff Relay, that is connect to the negative terminal along with the black and white wire from the dizzy pack.
Apparently the ECU uses it to sense the coil voltage and adjusts accordingly ? Not sure if that is correct, but I think it stops the coil from being over loaded ?
On the Lucas coil, this has a female spade to connect the resistor on the neg side, on my replacement coil this is not present. I think this is why it was missed, I have fitted the resistor, and will see what happens tomorrow. Land Rover still do the part. Part No. DRC1752L - Rimmers do it to but only worth ordering if you want other part as same price as Land Rover dealership. Land Rover of course do not have to post it.
Rimmers also do the Lucas Coil too Ignition Coil - Replacement for Lucas Type - Aftermarket at www.rimmerbros.co.uk
Most information on line refers to the 14CUX ECU where the same resisistor is used in the ECU harness and has a different use.
Last edited by Jeepster on Fri 04 Mar 2011 10:10 pm, edited 3 times in total.
Sometimes it's the getting there that can be as much fun as being there. Begin the journey.......
3.5 V8 EFI Flapper - 1988 - 2" Lift Custom - 31X10.5.X15 AT2s - Attitued of a Camel
This vehicle has not been named.............yet! It frequently gets called every thing under the sun
User avatar
Jeepster
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Re: Lucas RD 953066 Resistor fitted to coil. Do I need it ?
Postby Trev. » Sat 26 Feb 2011 1:28 am
You don't actually have a coil pack with that ECU as it has a non-managed ignition system. It's just looking for a pulse from the coil to determine that the engine is running. If it detects the engine is not running it shuts down the injection system. This is so that if the vehicle is in a crash and the engine stalls the fuel pump will not try and supply high pressure fuel to what may be a ruptured fuel line. I believe the resistor is there as a spike protector.
Same Nightmare, Different Day
Trev.
Admin
Posts: 10261
Joined: Thu 01 Mar 2007 5:32 pm
Location: Staffordshire
Top
Re: Lucas RD 953066 Resistor fitted to coil. Do I need it ?
Postby Jeepster » Mon 28 Feb 2011 8:00 pm
Thanks Cruiser - I connected it up to black and white lead going to the neg side of coil, and the engine did not start, took out the RD 953066 and engine started.
I had a look at the drawings and the workshop manual, Section 19 Page 13. The earlier drawings show '86 models had the resistor connected to the black and white wire. The 1988 drawings show the connections as the white lead with the blue tracer, coming from the ShutOff Relay.
The WSM shows the resistor, it as a 6.8 ohm resistor. There is also a test procedure for this shown. I wired the connection up making a mini harness to do it, due to the lack of a female spade terminal on the coil. Reconnected battery and engine started fine. Will see if effects cold start tommorow.
Intresting you say the RD was used being a "spike resistor", seems this is what was used on ECU on Hot Wire a mentioned earlier, though the location of the resistor is different.
Sometimes it's the getting there that can be as much fun as being there. Begin the journey.......
3.5 V8 EFI Flapper - 1988 - 2" Lift Custom - 31X10.5.X15 AT2s - Attitued of a Camel
This vehicle has not been named.............yet! It frequently gets called every thing under the sun
User avatar
Jeepster
Spanner man
Posts: 228
Joined: Sat 17 Jan 2009 11:12 pm
Top
Lucas RD 953066 Resistor fitted to coil, and cold starting..
Postby Jeepster » Mon 14 Mar 2011 11:08 pm
Well I fitted the resistor and checked voltage, etc, fine, however made not a bit of difference to starting.
It is the first three or four minutes before the Extra Air widget kicks in, and the revs go up. Once the valve opens up, it is fine. I checked the AFM seems ok. In advertently I had forgotten to do up the "jubilees" on the hose from the AFM to throttle opening on the plen. This resulted in no starting problem ? I tighten them up and I was back to the cold start issue.
I am wondering if it a problem either the "No2" Temp Sensor or Thermotime sensor ? Continued on new thread.....