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Old 05-08-2005, 02:01   #1 (permalink)
larry90
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300tdi cutting out

Can anyone make any suggestions please?

300Tdi in a '96 Defender 90 CSW has cut out twice, whilst driving.

No particular event preceded either occasion and luckily they weren't in the
outside lane of a motorway!!

Whilst driving along quite happily the power goes and ignition lights etc
come on. Attempting to start again results in engine turning over very
freely but not firing (normally the engine fires very quickly).

If left for a few minutes, say 5, the engine fires up again with no
indication there was ever a problem..................bless it !!

Last time it happened I removed the fuel filter and there was plenty of fuel
there, sadly didn't have spanners so couldn't check fuel presence at pump /
injectors.

Other thoughts were electrical, can anyone explain how the ignition switch
turns a diesel off, is there a solenoid valve or something in the fuel
supply train? I'm embarrassed to ask such a silly question but I'm more used
to petrol engines - that's my excuse and I'm sticking to it.

Thanks for any help,

Dave


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Old 05-08-2005, 03:01   #2 (permalink)
SimonJ
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Re: 300tdi cutting out

>
> Whilst driving along quite happily the power goes and ignition lights etc
> come on. Attempting to start again results in engine turning over very
> freely but not firing (normally the engine fires very quickly).
>

When you say the ignition lights come on, does the battery light come on
(and no others) after the engine has cut out, but while it is still being
turned by the movement of the vehicle? If so, this indicates that there is a
fault on the ignition circuit.

If the ignition lights (battery, oil) come on after the engine has stopped
turning, that is normal.

When it cuts out, does it cut dead, or does it lose power first?

>
> Other thoughts were electrical, can anyone explain how the ignition switch
> turns a diesel off, is there a solenoid valve or something in the fuel
> supply train?
>

There is a fuel cut off solenoid on the back of the fuel pump, just above
the injector pipes. Check the wire to this, make sure there are no breaks in
it etc.


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Old 05-08-2005, 03:01   #3 (permalink)
SpamTrapSeeSig
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Re: 300tdi cutting out

In article <Lo6dnVvPSPRKUODfRVnyjQ@pipex.net>, larry90
<dave_bromell@dsl.pipex.com> writes
>Other thoughts were electrical, can anyone explain how the ignition switch
>turns a diesel off, is there a solenoid valve or something in the fuel
>supply train? I'm embarrassed to ask such a silly question but I'm more used
>to petrol engines - that's my excuse and I'm sticking to it.


I had this problem (89 110 TD CSW), finally traced to a dodgy ignition
switch. Given the difference in age & design this may be irrelevant, but
have a look anyway. On mine, the original ignition/glow-plug circuits
are not a nice piece of design :( YMMV, but have a careful check anyway.

Getting the switch off is a real pain (awkward/no access & tiny screws,
easily lost - we're down to just one holding the switch on now :( ), but
once it's separated from the lock you can turn it with a
carefully-chosen flat bladed screwdriver If there's any slop, or signs
of heating around the connectors, I suggest you replace it.

Regards,

Simonm.

--
simonm|at|muircom|dot|demon|.|c|oh|dot|u|kay
SIMON MUIR, UK INDEPENDENCE PARTY, BRISTOL www.ukip.org
EUROPEANS AGAINST THE EU www.members.aol.com/eurofaq
GT250A'76 R80/RT'86 110CSW TD'88 www.kc3ltd.co.uk/profile/eurofollie/
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Old 05-08-2005, 05:01   #4 (permalink)
SteveG
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Posts: n/a
Re: 300tdi cutting out

My 300Tdi Discovery used to do exactly this ... finally traced the
problem to a dirty electrical connection to the fuel cut-off solenoid.
Removed the spade connector, cleaned up the terminal and replaced the
connector - no more problem. Gotta be worth a try ;-)

The cut-off solenoid is mounted on the injection pump block and has a
single wire going to it.

Regards

Steve G



larry90 wrote:
> Can anyone make any suggestions please?
>
> 300Tdi in a '96 Defender 90 CSW has cut out twice, whilst driving.
>
> No particular event preceded either occasion and luckily they weren't in the
> outside lane of a motorway!!
>
> Whilst driving along quite happily the power goes and ignition lights etc
> come on. Attempting to start again results in engine turning over very
> freely but not firing (normally the engine fires very quickly).
>
> If left for a few minutes, say 5, the engine fires up again with no
> indication there was ever a problem..................bless it !!
>
> Last time it happened I removed the fuel filter and there was plenty of fuel
> there, sadly didn't have spanners so couldn't check fuel presence at pump /
> injectors.
>
> Other thoughts were electrical, can anyone explain how the ignition switch
> turns a diesel off, is there a solenoid valve or something in the fuel
> supply train? I'm embarrassed to ask such a silly question but I'm more used
> to petrol engines - that's my excuse and I'm sticking to it.
>
> Thanks for any help,
>
> Dave
>
>

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Old 05-08-2005, 05:01   #5 (permalink)
larry90
Guest
 
Posts: n/a
Re: 300tdi cutting out

Hi Simon,

The engine doesn't appear to lose power first, it just dies and both
ignition and oil lights come on.

Thanks for your help,

Dave
"SimonJ" <me@mine.net> wrote in message
news:d5kk3f$lea$1@nwrdmz03.dmz.ncs.ea.ibs-infra.bt.com...
> >
> > Whilst driving along quite happily the power goes and ignition lights

etc
> > come on. Attempting to start again results in engine turning over very
> > freely but not firing (normally the engine fires very quickly).
> >

> When you say the ignition lights come on, does the battery light come on
> (and no others) after the engine has cut out, but while it is still being
> turned by the movement of the vehicle? If so, this indicates that there is

a
> fault on the ignition circuit.
>
> If the ignition lights (battery, oil) come on after the engine has stopped
> turning, that is normal.
>
> When it cuts out, does it cut dead, or does it lose power first?
>
> >
> > Other thoughts were electrical, can anyone explain how the ignition

switch
> > turns a diesel off, is there a solenoid valve or something in the fuel
> > supply train?
> >

> There is a fuel cut off solenoid on the back of the fuel pump, just above
> the injector pipes. Check the wire to this, make sure there are no breaks

in
> it etc.
>
>



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Old 05-08-2005, 06:01   #6 (permalink)
MVP
Guest
 
Posts: n/a
Re: 300tdi cutting out

On Sun, 8 May 2005 12:28:38 +0100, "larry90"
<dave_bromell@dsl.pipex.com> wrote:

>Hi Simon,
>
>The engine doesn't appear to lose power first, it just dies and both
>ignition and oil lights come on.
>
>Thanks for your help,
>
>Dave


I'd remove the plunger from the cut-off valve on the fuel pump (this
is what normally stops your engine) and see if it still cuts-out, if
it does then there is a problem with the feed to this valve, 'stop
solanoid' I think it's called.
by the way, the only way to stop your engine with this removed is to
stall it.
another option is to remove the spade connector and run a wire
directly from the main feed to the starter to the stop solenoid, this
will remove the normal feed from so if the syumptom stops you know
where the fault is, and you can remove the temporary wire to stop the
engine rather than having to stall it.


Regards.
Mark.
--
_________________________________________
1984 110 CSW 2.5(na)D - leaving soon
3.9 V8i LPG auto Disco - coming soon
www.4x4info.info
www.mvp-fine-art.co.uk
www.markvarleyphoto.co.uk
charity calendar project -
http://www.4x4info.info/calendar/
_________________________________________



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Old 05-08-2005, 14:01   #7 (permalink)
ChrisG
Guest
 
Posts: n/a
Re: 300tdi cutting out


Certainly sounds like the injector pump solenoid, it gets 12volts
when the ignition is on which pulls the solenoid plunger out of the
fuel supply and allows the fuel to flow. Turning off the ignition
drops the plunger causing the engine to stop through fuel starvation.

The wiring conection is prone to rust so could fail, replacement
costs around 15 and is a simple screwout/screwin job - you may get
away without bleeding the system. I have seen several solenoids fail -
one even melted, so its worth carrying a spare in the car.

If it only happens in the rain change the windscreen vent
seals..suspect water behing the dashboard.

ChrisG
300tdi def 110
53 80"


"larry90" <dave_bromell@dsl.pipex.com> wrote in message
news:Lo6dnVvPSPRKUODfRVnyjQ@pipex.net...
> Can anyone make any suggestions please?
>
> 300Tdi in a '96 Defender 90 CSW has cut out twice, whilst driving.
>
> No particular event preceded either occasion and luckily they

weren't in the
> outside lane of a motorway!!
>
> Whilst driving along quite happily the power goes and ignition

lights etc
> come on. Attempting to start again results in engine turning over

very
> freely but not firing (normally the engine fires very quickly).
>
> If left for a few minutes, say 5, the engine fires up again with no
> indication there was ever a problem..................bless it !!
>
> Last time it happened I removed the fuel filter and there was plenty

of fuel
> there, sadly didn't have spanners so couldn't check fuel presence at

pump /
> injectors.
>
> Other thoughts were electrical, can anyone explain how the ignition

switch
> turns a diesel off, is there a solenoid valve or something in the

fuel
> supply train? I'm embarrassed to ask such a silly question but I'm

more used
> to petrol engines - that's my excuse and I'm sticking to it.
>
> Thanks for any help,
>
> Dave
>
>



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