1994 Jaguar XJ6 Logo

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Posted on Mar 05, 2009
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1994 Jag XJ^ No Start

Car started and then just stopped -I have replaced the ECU and the Ign Amp as well as the coil and spark plugs. I have power at the Ign amp and the coil at the correct terminals. Spark reamains VERY weak and car will not start - HELP

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  • 2 more comments 
  • warp1 Mar 10, 2009

    I have replaced the crank pos sensor as well and the sense ring is completly clear

  • warp1 Apr 12, 2009

    I have checked the gas for water by removing the tank draining it and replacing the fuel. I found minor corrosion in the fuel rail so i replaced all the injectors and cleaned the rail. I have fuel pressure althought the check valve in the fuel pump module is bad but that should only effect the quickness of the starting i assume. when it starts it will sometimes idle ok for about a min and then start to miss then die. fuel pressure was constant during this idle too. when it is idling if i try to advance the throttle it imediatly dies. I have a new trtl pos sensor as well. - Is it possible for this problem to be caused by the Mass Airflow sensor?

  • Mark Glawdecki May 11, 2010

    I have also had to clean the crankshaft position sensor
    which also controls spark timing...It should not wear out but the connection may weaken if there is a lot of crud in the gap at the front.

  • Anonymous Mar 27, 2014

    CAR WILL NOT START NO SPARK AT PLUGS OR FROM COIL

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  • Posted on Mar 11, 2009
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If the car started and then stopped and if you have ruled out the fuel system(make sure you do have fuel pressure and your not chasing your tail) then it could be one of 2 items.
First i would replace the cap and rotor, I have had cars that ran fine then died and after replacing the cap and rotor have been perfect.
the other common issue with this model is water in the gas. The fuel filler drain gets clogged which allows water in teh gas tank, when the car sits it seems the mixture will allow the car to run then boom, it will die and not restart.
JP.

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in this case after fuse (test them , ones that look good can be bad)
these steps work or all EFI cars made.
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a 1 second check, do you try to run 60k mile belts 200k ?


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  7. if no sensor code errors or spark bad errors then do the next things.
  8. The ecu also reads back the Tacho signal and will report dead tacho, sig, the ECU creates this and is the COIL drive signal to the ignition coil via the IGNITOR device.
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as is the Ignitior tests, and the coil tests.
The FSM is an amazing thing if your read it.
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ECU = engine brain, or EFI brain
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Nov 20, 2017 • 1995 Jaguar XJ6
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Starter turning over but car not starting
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5) If all the above possibilities mentioned above checked out OK/perfect then its a electrical issue and the wiring's in the car needs to be checked.the car gets power from the battery to get started.so the wires from battery needs to be checked one by one.

Thanks. keep updated for any more query.you can rate this solution and show your appreciation.
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