Posting for a friend.
2000 V Reg HDi {This should have been included within the subject header, as per the 3 separate requests to do so!}
Sometimes when returning to the car it just won't start and you can leave it then it starts.
When this first happend the fuel pump was replaced had the car back for a day and it happend again anyway about 8 months ago the car was so called fixed apparently the problem was a little red button on the top right of the engine bay?
Reading on various forums it appers that the ignition relay is the problem most of the time could anyone tell me its location?
Im no mechanic but in the past on some old XR Sierra's when the relay went running a wire from the battery to the pump allowed it to start is this safe to do just as a test?
Edited by Dynamic Dave on 18/02/2008 at 10:20
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Not just XR's;also Capri's,Granada's and other makes..The fuel pump feed was required legally to shut down when the engine was not rotating;so it wouldn't keep pumping fuel in the event of a crash for example.A relay triggered from the distributor was one way on ensuring this.
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The red button is the inertia switch; they're not known for problems.
There is no ignition relay on HDi's; but there is a combination relay that feeds the ECU etc. and the fuel pump in the tank.
Does this problem occur with the engine hot or cold?
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If its any help, the ECU failed completely on my 306 hdi 1999, requiring a new circuit board at £500 ish. Also had the lift fuel pump in tank fail, airbag light flashing due to dodgy wiring, dodgy wiring to electric mirrors, broken front suspension spring, silly soft rear suspension on estate, most of which are renowned common faults I've read from various places.
Have you had the ECU read to see if any faults recorded...
Mine broke down after a holiday - and turns out the fuel cutoff switch had been activated (sounds like your little red button) as all the breakdown man did was press a button. Then broke down again somewhere down the M6 (ECU see above).
You could always try taking the fuel line off and turning the engine over to see if fuel is coming from tank. Also find a really GOOD diesel specialist, I've found normal garages aren't generally really very good at diesels...
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