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  #1  
Old October 30th, 2013, 04:53 PM
Roadglide07
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Dana Evans
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Question 95 Defender 90NAS no start

I received a 1995 Defender in a tupperware bin. After rebuilding the engine, I find myself with no 14CUX ecm requests for fuel pump relay(blue/purple wire) and fuel injection relay. Have replaced the ecm with a known good unit with the exact same results. Any ideas??? 1995 Defender 90NAS with 3.9 liter manual transmission.
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  #2  
Old October 30th, 2013, 05:02 PM
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Silver relay?

Bad pick up in dizzy?

Bad ignition module?
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Old October 30th, 2013, 05:44 PM
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Relays how about the inertia switch?
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Old October 30th, 2013, 05:46 PM
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Originally Posted by rover4x4 View Post
Relays how about the inertia switch?
That too.
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Old October 31st, 2013, 09:14 AM
Roadglide07
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Yes, silver relays. One for fuel pump and one main (fuel injection) relay. Have power on brown wire. Getting power during ignition key on through white/red wire. Have spark, but no fuel pump request or request through main relay. No fuel injection pulse using noid light.

------ Follow up post added October 31st, 2013 08:15 AM ------

Checked inertia switch and jumpered switch to be sure. Still no request from ecm.
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  #6  
Old October 31st, 2013, 11:35 AM
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Do you have a spare ECU to try?

The only other thing I can think of is that the pick up in the distributor/ignition module has some signal that is required to run, but I can't remember if it goes to the fuel pump or ECU.
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Old October 31st, 2013, 11:52 AM
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Have already installed a 'known' good ecm with the exact same problems. If the ignition module or the pick up where bad, I shouldn't be getting spark, correct?
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Old October 31st, 2013, 12:00 PM
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Quote:
Originally Posted by Roadglide07 View Post
Have already installed a 'known' good ecm with the exact same problems. If the ignition module or the pick up where bad, I shouldn't be getting spark, correct?
If memory serves me, and I am really taxing it here, there is something in the pickup which is necessary for the injectors to fire. Someone will know for sure. The ignition module can spark but will do so very weak and still look ok.
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Old October 31st, 2013, 01:39 PM
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The 97 GEMS has a crank position sensor that you might be referring ...


Take a look in these ...

http://p38arover.com/rover/p38a/Engi...UX_Systems.pdf

http://www.conehead.org/Projects/Lan..._injection.pdf

http://www.g33.co.uk/fuel_injection.htm
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Old October 31st, 2013, 01:42 PM
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No crank position sensor on a 14CUX.
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Old October 31st, 2013, 01:55 PM
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Quote:
Originally Posted by evilfij View Post
No crank position sensor on a 14CUX.
exactly ...
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Soapy water / KY jelly, etc. is is basically a must. Yes, good idea to remove trim panels - only takes 5 more minutes to do so.
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  #12  
Old October 31st, 2013, 02:14 PM
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Injectors fire based on coil pulse. White coil wire goes to ECU. ECU fires all the left and then all the right side injectors alternately (bank fire). So, if you have spark you probably have injectors. No fuel pressure at the injectors means no go.
You may not have a working fuel pump. Solenoids rarely crap out, so if they are present check the fuel pump. I'd be sure that the fuel pump fuse is good.
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Old November 11th, 2013, 04:36 PM
Roadglide07
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Thank you to all the inputs. Had already swapped both relays without any difference. Come to find out that both Fuel Injection and Fuel Pump relays were bad. Replaced relays and vehicle fired right up. Once again, thank you for the input.
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Old November 11th, 2013, 04:45 PM
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Quote:
Originally Posted by Roadglide07 View Post
Thank you to all the inputs. Had already swapped both relays without any difference. Come to find out that both Fuel Injection and Fuel Pump relays were bad. Replaced relays and vehicle fired right up. Once again, thank you for the input.
Good work Dana!

Now buy some spare silver relays to keep in the truck.
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  #15  
Old November 11th, 2013, 07:49 PM
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See post #2

can we make this sticky
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  #16  
Old November 11th, 2013, 09:09 PM
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See post #2 can we make this sticky
We should have a "I am broken down, please help thread" with common faults.

Anyone who does not carry spare silver relays is risking an inevitable tow.
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  #17  
Old June 9th, 2014, 06:13 PM
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Quote:
Originally Posted by evilfij View Post
Good work Dana!

Now buy some spare silver relays to keep in the truck.
Where are these (Fuel Pump) relays located on a 97? Are they on the passenger side?
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