Diesel Engine running on

[stigproducts]

It's Mondeo 1.8TD 1998.

Shutting off the engine it has starting running on for just a second or two. After a run it does this but if I start and stop again it doesn't do it/

Car needs the clutch done and I've thought if it could be related but can't see any links. I need to experiement with some clutch in vs clutch out switch offs.

I think it is easier to troubleshoot with a petrol motor- google this just returns lots of cars running on chip fat etc etc

Any suggestions?

TIA

[GreenV8S]

Presumably an oil leak somewhere, turbo would seem a likely suspect.

[thong]

to stop a diesel engine you(as you know)must stop the fuel flow to the injectors,on common rail which yours is not the injectors will switch off stopping fuel injection,on your mondy it has a injector pump with a cut off valve,so go there first it sounds like its not sealing off and letting fuel though when you switch off,its just a solinoid valve.

[K13 WJD]

hi there.........more info.....how long have you had this car ?????

Look under the drivers side seat....is there a box of tricks with PATS written on it ?????? if so, when you turn the engine on, look for a red LED next to your clock........

Reason i ask is, the pats is passive anti theft system. it's an immob.
It's responsible for the start stop solenoid......and when the pats goes wrong, 9 out of 10 derv mechanics will hard wire the soleniod direct to a 12V+ ignition feed......which on some mondeo's had a slight delay on the ACC position... this would explain a few seconds of run on.

[lotisi]

thong said:

to stop a diesel engine you(as you know)must stop the fuel flow to the injectors,on common rail which yours is not the injectors will switch off stopping fuel injection,on your mondy it has a injector pump with a cut off valve,so go there first it sounds like its not sealing off and letting fuel though when you switch off,its just a solinoid valve.

Ah but a diesel engine will run on engine oil, so if for example the turbo leaks oil into th e induction this will make the engine keep going even after the fuel has been switched off. If allowed to get bad enough it can cause the engine to rev to destruction.

[K13 WJD]

yeah, like when mr kwik fit over fills the turbo derv engine with oil, and its gets past the rings, and or oil seal..

nasty.....

in this case, i would expect him to have commented on a quantity of smoke ?

[lotisi]

K13 WJD said:

yeah, like when mr kwik fit over fills the turbo derv engine with oil, and its gets past the rings, and or oil seal..

nasty.....

in this case, i would expect him to have commented on a quantity of smoke ?

Only minimal for short amount of run on though?

[K13 WJD]

true. think this guy should take the pipe off the inlet and output of the turbo and check for oil ?????

[lotisi]

K13 WJD said:

true. think this guy should take the pipe off the inlet and output of the turbo and check for oil ?????

I'd go along with that, I definately wouldn't ignore it

[stigproducts]

Right......

As it happens ladies and gents...

At the weekend I changed the oil and I couldn't get the oil filter off from underneath so I took off the thingy at the back of the engine which as far as I could see cools air from the turbo before sticking it back into the engine. Is this called an intercooler??

Anyway the end that is joined to the turbo is a push fit and there are 2 rubber seals and they had oil on them and there was general oilyness in evidence.

So.......as this thing is apparently supposed to be for air and you lot are saying that there maybe an oil leak from the turbo I am guessing that this isn't meant to happen?

What now- am I entering a whole world of pain and expense. despite my ignorance of turbos I'm pretty capable of spannering- DIY job?

I have had this car over 4 years. it's been fine. The brake warning light just came on as well, that's never happened before-grrrrr

[K13 WJD]

yeah, thats an intercooler......does it say endura DE on it ????
take the pipes off from the turbo, look for oil in the inlet ( air filter side )
and output side. use a torch to look into the bottom of the chamber. Check for endfloat and side play in the shaft - ie try pulling it in and out, and side to side. (gently) by grasping the nut on the end of the shaft.


When you say oilness....there would really have to be OIL, not just a coating.....although really there should be none.....

A oil seal on that turbo isnt the end of the world did one on my starion in a hour..........you could change the seal yourself if your competent......but other than that a scrappy's will stock one...... are you 100 percent sure you didnt overfill this engine.

how much oil did it take ????? ive seen endura's with the wrong dipstick, and them with sludge blocking the dipstick pipe.

Edited by K13 WJD on Wednesday 22 August 21:31

[thong]

lotisi said:

thong said:

to stop a diesel engine you(as you know)must stop the fuel flow to the injectors,on common rail which yours is not the injectors will switch off stopping fuel injection,on your mondy it has a injector pump with a cut off valve,so go there first it sounds like its not sealing off and letting fuel though when you switch off,its just a solinoid valve.

Ah but a diesel engine will run on engine oil, so if for example the turbo leaks oil into th e induction this will make the engine keep going even after the fuel has been switched off. If allowed to get bad enough it can cause the engine to rev to destruction.

yes we know they will,and the intercollers on these always have oil in them from the breather ststem.

[stigproducts]

Thanks, I've been reading up on turbo's so I've got a better idea now.

I put 5 litres in it exact. I noticed the oil between the turbo and the intercooler during the lube job so if there is a problem it was there before I did that.
So we're taking a worn shaft(requiring a repalcement unit) or some sort of seal that needs replaced?

Or maybe not given what Thong is saying.

More things to check out; I'll stay home until the monsoon season finshes!

Edited by stigproducts on Wednesday 22 August 21:41

[lotisi]

thong said:

lotisi said:

thong said:

to stop a diesel engine you(as you know)must stop the fuel flow to the injectors,on common rail which yours is not the injectors will switch off stopping fuel injection,on your mondy it has a injector pump with a cut off valve,so go there first it sounds like its not sealing off and letting fuel though when you switch off,its just a solinoid valve.

Ah but a diesel engine will run on engine oil, so if for example the turbo leaks oil into th e induction this will make the engine keep going even after the fuel has been switched off. If allowed to get bad enough it can cause the engine to rev to destruction.

yes we know they will,and the intercollers on these always have oil in them from the breather ststem.

I wasn't having a snipe

[That Daddy]

Check the fuel shut off valve plunger isnt sticking,this was a common problem on the transit 2.5Di i have done at least three in my career,one would not stop running and the others ran for about a few seconds after you turned the key off,replacements cured alljust a quick heads up.

Edited by That Daddy on Thursday 23 August 08:56

[thong]

That Daddy said:

Check the fuel shut off valve plunger isnt sticking,this was a common problem on the transit 2.5Di i have done at least three in my career,one would not stop running and the others ran for about a few seconds after you turned the key off,replacements cured alljust a quick heads up.

Edited by That Daddy on Thursday 23 August 08:56

just as i said the daddy,id go for this all day over the turbo??????????????

[thong]

lotisi said:

thong said:

lotisi said:

thong said:

to stop a diesel engine you(as you know)must stop the fuel flow to the injectors,on common rail which yours is not the injectors will switch off stopping fuel injection,on your mondy it has a injector pump with a cut off valve,so go there first it sounds like its not sealing off and letting fuel though when you switch off,its just a solinoid valve.

Ah but a diesel engine will run on engine oil, so if for example the turbo leaks oil into th e induction this will make the engine keep going even after the fuel has been switched off. If allowed to get bad enough it can cause the engine to rev to destruction.

yes we know they will,and the intercollers on these always have oil in them from the breather ststem.

I wasn't having a snipe

sorry lotisi

[stigproducts]

Big thanks to everyone who has offered advice.

I've done the clutch and brakes now and I'm back to this problem- which went away and is now intermittent, albeit currently featuring a radom unwillingness to start.

I've checked out my manual and these diesels have a Bosch or a Cav Rotosomething fuel pump

OK- lets check it out. "oh, it is nothing like the ones in the pictures and has LUCAS written on it...."

So- can anyone advise, is the solenoid the thing in this picture? do i need to take it out and replace the O ring and if so how do i get that wire out so I can unscrew it??

[Pigeon]

Yes, that's it, you'll have to trace the wire back and unplug the other end of it. Just replace it, you can't reliably unstickify a sticky one.

[stigproducts]

Ok, thanks all. I replaced this little widget (surprisingly expensive for such a small item) and the car is better. Still runs on a touch very occasionly (eg approx twice this year, think I replaced it about christmas time) and has been slow to start a couple of times but I think a new one has sorted this out.