Engine Won't Stop

Discussion in 'Base Chassis Section' started by oldfozzie, Oct 13, 2011.

  1. oldfozzie

    oldfozzie Funster

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    On a W Reg. Peugeot based Wentworth the engine doesn't stop when the "ignition" key is turned off; even when allowing the engine to cool down first.
    The Fuel Cut-off solenoid switch has been changed which solved the problem for a few weeks but it then returned.
    The mechanics have reported that "swarf" is preventing the contacts from closing ( opening ) but I don't really see how.

    Any ideas?:Sad:
     
  2. upmarkethippy

    upmarkethippy Read Only Funster

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    bad news i am affraid

    On this occasion I would like to be proved wrong, but, are you sitting down????

    When this happened to a vehicle of mine, it was the diesel distributor pump breaking down inside - the cure being a new distributor pump.

    Sorry to be the bearer of bad news.

    Cheyne
     
  3. spannermanwigan

    spannermanwigan Read Only Funster

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    have to agree with upmarket hippy common problem on diesel fuel pumps
    if your mechanics have found metal swarf (filings) when they removed the
    fuel cut of solenoid.this unfortunately does indicate imminent failure of the
    main fuel pump rotor,the cure for which is a replacement pump or your
    own pump overhauled , please do not continue to operate your vehicle in this
    condition as it can lead to failure of other components including the dreaded
    cam belt failure due to seizure of the fuel pump..Injectors will also require
    checking as the filings can make their way from the pump to them.

    The fuel cut of solenoid simply lifts a fuel cut of valve which opens when the
    ignition is on and allows fuel to pass and the engine to run,and when the ignition
    is off the solenoid releases its magnetic lift on the valve and the valves return
    spring closes the valve onto its seat cutting off the fuel and stopping the engine.
    When swarf is present the valve wont seal and the engine continues to run.
    A bit a kin to a tap which drips when closed because the tap washer wont seal.

    Hope this is helpful. regards steve
     
  4. jhorsf

    jhorsf Read Only Funster

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    WOT they said above is my guess also I am afraid:Eeek:
     
  5. motor roamin

    motor roamin Funster

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    I would agree it is pump but some can be reconditioned although still not cheap, cheaper than new one,

    All the best Rick
     
  6. motor roamin

    motor roamin Funster

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    Sorry spannerman should have read your post before replying I see you already said it :Blush:

    All the best Rick
     
  7. lugnutt

    lugnutt Funster Life Member

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    ive heared of this due to carbon buildup it glows ignighting fuel even with ignition off may need a decoke
     
  8. spannermanwigan

    spannermanwigan Read Only Funster

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    just to clarify,

    Lugnutts suggestion is only applicable to petrol engines and
    occurs when carbon build up in the cylinder creates a permanent source of
    ignition, which replaces the spark plug as the heat source for start of
    combustion of the air fuel mixture and causes the engine to continue to run on
    even though the ignition has been turned off. This does not apply to
    Diesel engines as compression ignition ceases as soon as fuel is cut off.

    steve
     
  9. oldfozzie

    oldfozzie Funster

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    Many Thanks

    Many thanks one and all for your replies, sounds like a replacement pump is the answer.:cry:
     
  10. Wildman

    Wildman Read Only Funster

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    a screwdriver in the bottom of the fuel tank will sort it whatever the cause, cheap to :thumb:
     

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