Car (33,000 miles) just 4 years old failed to start. No previous problems. After 10 days Ford dealer claimed it was a faulty solenoid valve in fuel injection pump and replaced the pump. Then said that the engine management module had burnt out and needed replacing.
How can this happen in a normally running engine or during diagnostic tests?
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Anything can "happen" when total muppets are taking wild guesses at the reason they can't fix it.... [ECUs do not "burn out."]
This is a Peugeot HDi - not an Escort MkII - and it takes years to understand them. They never will.
Take it to a diesel specialist.
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I suspect that one of the fuses for the injection system was blowing,thus the non start.This particular fuse controls power to the Ecu and other components.I would think that the dealer has put 2+2 together to make 3 and made the incorrect choice of replacing the Ecu and pump ,when actually the faulty component was (commonly) the fuel filter heater!hth
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Screwloose. Thanks for helpful comments. Dealer got the car going with fuel from a can and then said problem was with solenoid valve. I agreed £900 to replace injector pump of which valve, I am told, is integral part. They then said valve breakdown caused ECU failure and want another £900.00 to replace the ECU. I am not paying and have referred matter to Ford who so far claim it is fair wear and tear. Customer relations say letter on way but it doesn?t materialise. I doubt the injector pump was the problem so still ?doing battle?. Car has been off road for 5 weeks.
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What the heck!! Get it away from these pea-brained clowns; they don't even understand that it's common-rail and are wrecking your car....
What "solenoid" were they dreaming of? There isn't a stop solenoid on a common-rail anywhere - and feeding it from a can can easily trash the high-pressure pump; [which, clearly wasn't the fault anyway] and the injectors.
There are no "integral" solenoids on a Siemens SID 803 [or 804] pump; there are only the pressure control solenoid and the IMV/fuel delivery control solenoid, both replacable. As neither of them can cause damage to the ECU; then inexpert fiddling/shorting of terminals can be the only plausible causes of this claimed ECU damage - that's if they're going to stick to their latest guess....
Doc's idea of a blown fuse is far more likely than anything they've dreamt up; I'll bet they haven't even done the basic test procedure.
Edited by Screwloose on 05/03/2008 at 17:26
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I would ask / demand to see evidence of the 'burnt up' ECU. What tests have they done to establish this? Just because they cannot get a particular signal out does not mean that the ECU is defective. May well be that some other signal is not getting in to the ECU in the first place.
They may, of course, be correct in that something on the ECU has failed. On a car, these circuit boards are not built to last and are actually fairly simple.
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Thanks for all this information it is really useful. You say the ECUs are not built to last, is that a few years of use or milegae? Car just 4 years old and 33,000 miles when it failed to start. As the garage took 10 days before they said the ECU had burnt out it appeared that they were not familiar with this so I assumed that it does not happen often.
I am following it up and will post the outcome when I eventually get one.
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The only burned ECUs that I've ever seen were down to jump-starts going wrong. ECUs use very little power, so they are usually on fairly light fuses.
Very few ECUs need replacing unless they are water or vibration damaged; [Vauxhalls] most, up until recently, are repairable.
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