engine wont turn off (2 Viewers)

[Rapido772f]

my fiat 2.8 turbo diesel engine continues to run when i turn off and
take the key out of the ignition any ideas as to whats going wrong?

 

[Derbyshire wanderer]

Injection pump solenoid stuck open most likely. Give it a gentle tap with a hammer handle and see if it stops.

 

[Zains Pops]

Check your oil level. Diesel engines can run on if the lube oil can get foamed up and make its way into the combustion chambers, they can race away and blow up.....beware.

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[andy63]

it sounds like your turbo oil seal may have gone and the engine is continuing to fuel..
which can in extreme cases run away.. is it smoking badly..
Andy

 

[DBK]

If it's done a high mileage I suppose it could be burning its own oil, through worn bores or valve stems perhaps? Does it use a lot of oil?
Otherwise, and probably more likely I think, there is a solenoid on the fuel injection pump to shut the fuel off. Which it isn't by the sound of it.
Hopefully, someone with more knowledge of the engine can comment.

I assume you can stop the engine by stalling it in a high gear?

 

[Pausim]

I had something similar happen on my Renault based motorhome. To cut a long eaxplanation short it was a wiring fault back feeding the circuit that held the injection pump solenoid open. If the more probable explanations already given above don’t work try disconnecting the wire to the solenoid, if it makes no difference it is not an electrical fault.

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[funflair]

If its running on oil it should be smoking and a very oily exhaust as well so if its running normally my money would be on the fuel solenoid or whatever controls the pump, our old Merc car engine was controlled by vacuum if you lost vacuum you couldn't stop the motor.

Martin

 

[pappajohn]

Self fuelling (oil fumes) is extremely rare so I would discount that theory...and when it does happen it invariably revs itself to destruction..which it obviously isn't.
Stuck/faulty cut off solenoid will be the problem.
The solenoid is held open electrically but if jammed can't close when power is removed.
Easiest way to stop it is let it idle in a high gear (4th/5th), clutch down.
Foot hard on brake then let the clutch out quickly...Just dump it, don't let it out slowly.

 

[WillH]

I was responsible for a fleet with Volvo truck engines, stop solenoid failure was our No.1 maintenance job, they didn't last a year and were always replaced under warranty. Never had to pay for any of them.

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[Spanner]

You may find this information helpful

1. Originally Posted by Hometune https://www.rac.co.uk/forum/showthread.php?s=aed839bcbb6a61e60dc1f6a27b06b754&p=61966#post61966
   On the top of the high pressure pump on the engine is the fuel shut off valve. It is a solenoid, so that when you switch the ignition on, pulls a plunger out of the fuel pipe and lets fuel go to the engine. When you switch off, a spring forces it shut so cutting off the fuel supply. This is likely to be the faulty part. In an emergency the breakdown people used to remove this unit, take out the spring and plunger and this would always allow the car to start. But the down side is you have to stall the engine to stop it.
   Thanks for your speedy reply, I have been told that my 2.8 JTD is a common rail engine and that it dosn't have a stop solenoid? do you agree with them?
   Reply With Quote
2. 30-08-10, 19:02#4Hometune
   Formula 1 Driver
   
   Join Date
   May 2008
   Posts
   10,563
   
   When I looked up your question I checked Autodata first but your engine is not shown in detail. So I looked on my Bosch diagnostic tool and there was a clear picture of the stop solenoid with a description. Your engine has a common rail injection system made by Bosch. If its wrong then Bosch have made the mistake!

 

[jockaneezer]

It probably needs a decoke, my FS1E used to run on once the piston crown was all carbon'd up.

 

[Lofty1]

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[Wildbill]

Fuel solenoid staying open not uncommon burning oil unlikely as it would destroy it self as previously mentioned
bill

 

[Allanm]

Our 2.5 engined Ducato does that occasionally, it appears to be a commonish problem, but I have never found a definitive answer.
I have found damaged and loose connectors in the engine bay and replaced all those, but it still happens occasionally. I can either stall it to stop it, or, if I let the engine idle for a few minutes, it will switch off normally.
You should check all the earth connections on the body and engine, ducato’s like to rust , especially where the earth connectors are.
Over the 14 months we have had our van, it has had this problem maybe a dozen times, in about 14000 miles.

 

[deleted-member02]

I had a similar problem with my old 2.5tdi. Turned out to be a fuel pump / immobiliser issue.
Engine would generally start fine but wouldn't turn off, even with the key removed.
Had to stall it every time, which wasn't ideal, particularly when we had to catch the tunnel home
Having the pump reconditioned by a diesel specialist solved the problem but wasn't cheap...

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[pappajohn]

It probably needs a decoke, my FS1E used to run on once the piston crown was all carbon'd up.

There's a word I haven't heard for maybe 40 years.
Modern fuels and oils have all but sent that job to the history books.
Same as in the 30s and 40s......
15000 mile and you would be booking in for a rebore.
Today of course, you do more than that between oil changes.

 

[Nirvanauk]

How do you stall it if it’s an automatic?

 

[Allanm]

I had a similar problem with my old 2.5tdi. Turned out to be a fuel pump / immobiliser issue.
Engine would generally start fine but wouldn't turn off, even with the key removed.
Had to stall it every time, which wasn't ideal, particularly when we had to catch the tunnel home
Having the pump reconditioned by a diesel specialist solved the problem but wasn't cheap...

I have a feeling it’s an immobiliser issue. My alarm has been mostly disconnected. When we bought the van, the alarm had been disabled, the previous owner never had it working and there are no fobs with it. I had a few problems with it setting itself off so disconnected and bypassed everything I could, but I think the fuel pump immobiliser is still in place. I am gradually removing stuff as I find it but have little idea how it is wired into the original loom.

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[Spanner]

Duplicated post

 

[Spanner]

How do you stall it if it’s an automatic?

Pull the electric fuel pump fuse ?

 

[Nirvanauk]

Pull the electric fuel pump fuse ?

Thanks, but how would I know where to find it and which one it was?

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[pappajohn]

The immobiliser stops the solenoid opening and allowing fuel to flow.
As the engine runs but won't stop it isn't the problem....if it was it wouldn't start in the first place.
We still don't know if it's a JTD engine or a TDiD but the latter doesn't have an electric pump, the injector pump doubles as a lift pump and is purely mechanical.

 

[DavidG58]

I am now presuming this wasn't maybe as serous an issue as it sounded, or it was extremely serious

OP hasn't been back on here since one minute after posting this thread

It has got me wondering what I would do though, I have an auto and no idea where my fuel pump fuse is, it was raised on another thread about being a good security addition

 

[Tony50]

you could spend a lot of money changing this that and the other, if you are not professional enough take it to a diesel/electrical expert workshop. Don't guess.
Tony A.

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[pappajohn]

OP hasn't been back on here since one minute after posting this thread

Annoying isn't it.
A member poses what appears an urgent question then doesn't have the decency to check for replies, let alone acknowledge them.

 

[DBK]

If there was any emergency it would have been reported here.

http://www.norfolkfireservice.gov.uk/nfrs/response/live-incident-feed

 

[klaatu]

Come on, he only posted 24 hours ago, and he didn’t make any claims about it being urgent. Didn’t look urgent to me. Not everyone logs on every 5 minutes.

It’s good that when you post on this forum you can expect several good answers within a few minutes (plus the usual uninformed guesses), but please don’t castigate people for not coming back immediately with a follow-up. There are all kinds of reasons for someone not coming back for a few days.

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[Podney]

Of course he’ll come back,he’s a Rapido owner. They are all jolly decent folk,impeccably well mannered,the best of the best!

 

[DavidG58]

I have just spotted he has only made 4 posts, but really odd to post then go the same minute

I did read it as urgent, I really thought he was sat somewhere with the engine running and didn't know what to do

 

[pappajohn]

Agreed, re: not logging in, but being a member for the last five years they know replies on this forum, unlike many others, will be almost instant and as the question was asked its only reasonable to expect the op was waiting for a response and to regularly check for replies.
Not being able to turn off the engine seems pretty urgent to me....some folks wouldn't even think of stalling it.

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