Engine won’t cut off

Technical questions and answers about the Mazda Bongo

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Aitken1
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Engine won’t cut off

Post by Aitken1 » Mon Dec 11, 2017 6:39 pm

Hi just got a 97 bongo and on it’s second outing it’s engine won’t shut off even when the keys are out. Also there’s a high pitched beeping sound which sounds likes the lights are on warning but lights are definitely off. Could it be the solenoid? Also would the colder weather be screwing with it? as it was fine when it was milder weather..if it is the solenoid is this an expensive job..
Not a great start to bongos!!
Thanks any help appreciated..
Bob
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Re: Engine won’t cut off

Post by Bob » Mon Dec 11, 2017 6:52 pm

I would think there is a fuel shut off solenoid on or near the fuel pump.

Could be some moisture has got to it and frozen, so I wouldn't think it's a dear job. Even replacing it should be fairly straightforward.

Hopefully someone with more techie knowledge will be along soon, and warm welcome to the Forum. 8)

I'm guessing it's diesel?
Take a torch, toilet roll, and tea bags.

https://m.youtube.com/watch?v=hcF9JSxkUSE
Aitken1
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Re: Engine won’t cut off

Post by Aitken1 » Mon Dec 11, 2017 7:06 pm

Thanks yes it’s a diesel. Can you pick up solenoid new on this site?
Aitken1
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Re: Engine won’t cut off

Post by Aitken1 » Mon Dec 11, 2017 8:00 pm

So it doesn’t turn off if I have the brake on first then try to turn it off but does if I turn it off then put handbrake on..is that right?? fairly new to bongos and automatics but sounds strange to me..
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g8dhe
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Re: Engine won’t cut off

Post by g8dhe » Mon Dec 11, 2017 8:13 pm

The usual cause of these problems is a faulty fuel cut-off valve;

as above, it sounds like its not fully shutting off, often caused by the return spring having failed or become weak.
Geoff
2001 Aero V6, AFT, full side conversion.
teenmal
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Re: Engine won’t cut off

Post by teenmal » Fri Dec 15, 2017 1:38 pm

Aitken1 wrote: Mon Dec 11, 2017 8:00 pm So it doesn’t turn off if I have the brake on first then try to turn it off but does if I turn it off then put handbrake on..is that right?? fairly new to bongos and automatics but sounds strange to me..
It is usually the Fuel Stop Solenoid that caused this type of fault, but looking at your reply re the handbrake it is possible that the vehicle Might be fitted with a Turbo Timer of some sort.

Take Care
nth
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Re: Engine won’t cut off

Post by nth » Fri Dec 15, 2017 5:12 pm

Does it eventually switch of by itself after around 10 minutes? Does the beeping start as soon as you turn the key off ? If so then its likley to be a turbo timer. There would normally be a little unit fitted by your knees?
95 2.5d 4WD AFT
Aitken1
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Re: Engine won’t cut off

Post by Aitken1 » Fri Dec 15, 2017 5:18 pm

HI yes there is a small black box that is near my knees. it was switched off but when I put it on it has s 1-5 scale?? The beeping does start when it’s turned off..

How does this operate? and is it faulty or should I be doing something?
Still new to this...
Thanks
S
Bob
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Re: Engine won’t cut off

Post by Bob » Fri Dec 15, 2017 7:14 pm

The idea is that it keeps the engine running for a time after you switch off in order for the turbo to spool down.

The time period can be set, hence the 1-5 scale.

If switching off immediately after the engine has been working hard the turbo can be damaged, but you can just sit and let it idle for a couple of minutes before switching off after, say, leaving the motorway, climbing a good hill or towing.

Bear in mind if you decide to use it it's an offence to leave the engine running when the vehicle is unatended. :wink:
Take a torch, toilet roll, and tea bags.

https://m.youtube.com/watch?v=hcF9JSxkUSE
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