XJ6 & XJ12 Series I, II & III 1968-1992
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79 XJ6 VP no start issue. Please help

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  #41  
Old 03-16-2014, 05:15 PM
king_me's Avatar
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Originally Posted by Doug
I respectfully disagree with Jay on the coolant temp sensor.

The engine won't run (or shouldn't) run with it disconnected, and a running engine will die instantly if you unplug it. Some say a disconnected sensor stops injector pulse; others say it fattens the fueling so much that the engine dies. I'm in the former camp, not the latter.

Anyhow.....

Pull the connector and jump the terminals inside with a paper clip. This tricks the ECU into thinking the engine is fully warmed up and commands the injectors accordingly. If the engine now starts then you're on the right track.

Naturally you'll check the condition of the terminals while you're there.

Cheers
DD
There are 3 connections on the plug.... jump the outer two?
 
  #42  
Old 03-16-2014, 06:18 PM
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Originally Posted by king_me
There are 3 connections on the plug.... jump the outer two?

Hmmm. I think you have your hands on the wrong temp sensor.

On your V12 it's the two wire sensor just aft of the LH thermostat.

Cheers
DD
 
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