Question about 1994 Land Rover Discovery

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Long Crank times before starting

Hello, when my 1994 pre update V8i 3.9 Disco has been sitting for anymore than 10 minutes to overnight, it takes about a full 15-20 seconds of cranking to get it to start. Though when its hot it will start fine. I once left the car for 7 weeks untouched and it started straight away. I've replaced the Coolant Sensor, checked fuel pressure (good), compression (good) though spark is somewhat weak so I've been told, also sounds like there is a "miss" when its running. Seems to idle ok without "hunting". Would appreciate you help with this issue. I want it to start at first turn of the key.

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  • 6ofthebest Jul 14, 2008

    I have not tried this method at all. I'll give this way a go and hopefully it'll lead me to the potential problem and get back to you about how it reacted. Thanks mate.


  • 6ofthebest Jul 14, 2008

    Could this mean my fuel pressure regulator is defective??



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Sounds like it could be losing fuel pressure to the rail, try turning ignition on for 10s, then off then on then off then try start. That should make sure the pump has pressurised so will see if it is pressure.


Posted on Jul 14, 2008

  • chris577 Jul 15, 2008

    It will be either the regulator at the fuel pump, regulator at the engine or injector leak, give it a go and see what happens, then can work out where it is losing pressure from.




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