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1983 Jaguar 5.3l V12HE

I am having problems with the fuel supply, i have changed the fuel pump and the fuel is now reaching the spray bar but the injectors are not opening?
I sent the fuel Ecu unit away to be checked but they found no problems with it.
The injector are still not working/opening any ideas?

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Sound electrical, go over the electrical components again.

Posted on Aug 24, 2009

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  • Phredus
    Phredus Aug 26, 2009



    Check the pressure before it reaches the injector. Then check that the injectors ar in fact opening and closing when you apply the electrical current .



    ­A fuel injector is nothing but an electronically controlled valve. It is supplied with ­pressurized fuel by the fuel pump in your car, and it is capable of opening and closing many times per second.

  • Phredus
    Phredus Aug 26, 2009



    Check the pressure before it reaches the injector. Then check that the injectors ar in fact opening and closing when you apply the electrical current .



    ­A fuel injector is nothing but an electronically controlled valve. It is supplied with ­pressurized fuel by the fuel pump in your car, and it is capable of opening and closing many times per second.

  • Phredus
    Phredus Aug 26, 2009



    Check the pressure before it reaches the injector. Then check that the injectors ar in fact opening and closing when you apply the electrical current .



    ­A fuel injector is nothing but an electronically controlled valve. It is supplied with ­pressurized fuel by the fuel pump in your car, and it is capable of opening and closing many times per second.

  • Phredus
    Phredus Aug 26, 2009



    Check the pressure before it reaches the injector. Then check that the injectors ar in fact opening and closing when you apply the electrical current .



    ­A fuel injector is nothing but an electronically controlled valve. It is supplied with ­pressurized fuel by the fuel pump in your car, and it is capable of opening and closing many times per second.

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Check your fuel regulator, sounds like not enough pressure is present to open the injectors.

Posted on Nov 21, 2007

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