P38 2.5 DSE Cut out

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K

Kellben

Member
Posts
17
Location
Devon
Hi all,
Apologies for first time post being a problem, being long winded and if I have missed the answer to my question while searching threads and Rave etc.
Basically just bought a rough N reg 2.5 that has been parked up for a month. It wouldn't start when I got there, in tank pump has failed I think, but after drawing fuel up got it running and she sounded sweet ticking over for ten minutes.
Decided to risk the drive home and managed 3.5 miles before injector light came on and I realised it had cut out, was on overrun at the time.
Plugged it in with a Snap-On scanner and got code 134 Injection Begin/Slide Position Sensor. I initially believed this to be injector no. 4 faulty but have seen some conflicting opinions as to whether this can cause it to cut out and not restart. The fault is constant and will not clear.
If anyone could shed some light on this that would be great. Had to abandon vehicle so cant test or give any more details at the moment.
TIA.
 
Kellben said:
Hi all,
Apologies for first time post being a problem, being long winded and if I have missed the answer to my question while searching threads and Rave etc.
Basically just bought a rough N reg 2.5 that has been parked up for a month. It wouldn't start when I got there, in tank pump has failed I think, but after drawing fuel up got it running and she sounded sweet ticking over for ten minutes.
Decided to risk the drive home and managed 3.5 miles before injector light came on and I realised it had cut out, was on overrun at the time.
Plugged it in with a Snap-On scanner and got code 134 Injection Begin/Slide Position Sensor. I initially believed this to be injector no. 4 faulty but have seen some conflicting opinions as to whether this can cause it to cut out and not restart. The fault is constant and will not clear.
If anyone could shed some light on this that would be great. Had to abandon vehicle so cant test or give any more details at the moment.
TIA.
Click to expand...

What's the timing modulation like on it?
 
Hi,
Thanks for reply. I’m not going to be able to test/check anything until I can get it recovered unfortunately.
Are you thinking along the lines of the pump going too far out of time?
 
Mark Piercy said:
Welcome to insanity!
What mileage is on the bus?
Any leaking from around the pump joints, may be age and or mileage related?
Click to expand...
Thank you! I knew it was a silly bit and it proved me right quickly.
Mileage is around 150k from memory.
There was diesel residue all down the pump side of the engine from where the owner and his mate had tried getting it started unsuccessfully.
Once I got it running it was pretty sweet and responsive. No warning or lack of power until it stopped.
The previous owner said it needed a couple of heat cycles to start when hot occasionally and put this down to the hot start issue (believe this is pump timing?) but never sorted it.
 
Nothing to do with number four injector. Possible quantity servo fail you need proper diag on it. Needs new glow plugs if they need two applications. Must have a hot fix fitted, glows do not normally operate when engine is hot.
 
wammers said:
Nothing to do with number four injector. Possible quantity servo fail you need proper diag on it. Needs new glow plugs if they need two applications. Must have a hot fix fitted, glows do not normally operate when engine is hot.
Click to expand...
Is there a specific diagnostics available cheaply if a generic Snap-On scanner isn’t accurate? For example I have had INPA BMW diagnostics for circa £30.
Ah thought that might be the case. Couldn’t remember my old TDS BMW having glow plugs when warm.
 
It sounds like you're about to start an adventure sorting out years of "that'll do" repairs!!
Hopefully it's not going to be an expensive adventure.
One reason people sell is because they can't or won't repair these expensive machines properly and the bodge work doesn't hold for very long..... Answer the questions and follow the advice and you'll get the answers needed, oh and give as good as you get:D
As Mr wammers says, diagnostic with live data and codes read is a good place to start.;)
 
Kellben said:
Is there a specific diagnostics available cheaply if a generic Snap-On scanner isn’t accurate? For example I have had INPA BMW diagnostics for circa £30.
Ah thought that might be the case. Couldn’t remember my old TDS BMW having glow plugs when warm.
Click to expand...

Nanocom is what you want or someone with one that knows how to use it. They are not cheap. Technically the slider position sensor is the quantity servo. This will have lost feedback contact to ECU, if that happens the engine shuts down.
 
Mark Piercy said:
It sounds like you're about to start an adventure sorting out years of "that'll do" repairs!!
Hopefully it's not going to be an expensive adventure.
One reason people sell is because they can't or won't repair these expensive machines properly and the bodge work doesn't hold for very long..... Answer the questions and follow the advice and you'll get the answers needed, oh and give as good as you get:D
As Mr wammers says, diagnostic with live data and codes read is a good place to start.;)
Click to expand...
Yes it certainly. Me being me that’s part of the appeal but I didn’t anticipate/want to start with a fault like this! Should know better by now.
Sadly for what it owes me, it may well be a sell off the good bits and ditch the rest if it looks too expensive to get it running again.
Once I can get it recovered, may even join the AA for sake of ease, I’ll start investigating.
 
wammers said:
Nanocom is what you want or someone with one that knows how to use it. They are not cheap. Technically the slider position sensor is the quantity servo. This will have lost feedback contact to ECU, if that happens the engine shuts down.
Click to expand...
I don’t but I am close ish to two LR specialists although unlikely to get it there without it running.
Quantity servo is presumably like pressure regulator/suction valve if replaced on more modern common rail pumps that control the fuel flow?
 
How much fuel is in the tank? If it is very low and the in tank pump has failed it may cause the engine to stall, it also produced a fuel flow fault on my project car.
If the car started and ran initially you can forget things like modulation for the moment.
Diagnostics such as Nanocom are essential, have a look on LZIR to see if there is anyone near you with diagnostics.
 
Datatek said:
How much fuel is in the tank? If it is very low and the in tank pump has failed it may cause the engine to stall, it also produced a fuel flow fault on my project car.
If the car started and ran initially you can forget things like modulation for the moment.
Diagnostics such as Nanocom are essential, have a look on LZIR to see if there is anyone near you with diagnostics.
Click to expand...
From memory it had quarter of a tank. I thought of that initially but didn’t think that would be possible to bring the light on constantly and have a constant fault code.
 
Kellben said:
I don’t but I am close ish to two LR specialists although unlikely to get it there without it running.
Quantity servo is presumably like pressure regulator/suction valve if replaced on more modern common rail pumps that control the fuel flow?
Click to expand...

It controls the amount of fuel delivered by each stroke of the piston. The ECU uses it to position a sliding control sleeve depending on throttle position and revs/power requested. It has potentiometers fitted that feed it's position back to the ECU. If that contact is lost the engine is shut down by dropping the emergency stop solenoid.
 
wammers said:
It controls the amount of fuel delivered by each stroke of the piston. The ECU uses it to position a sliding control sleeve depending on throttle position and revs/power requested. It has potentiometers fitted that feed it's position back to the ECU. If that contact is lost the engine is shut down by dropping the emergency stop solenoid.
Click to expand...
Understood. Is similar as to what I’m thinking of on common rail.
I’ll stop bothering everyone until I get it home and can take a better look.
I’ll try and have another read through Rave info in the meantime.
 
Kellben said:
Understood. Is similar as to what I’m thinking of on common rail.
I’ll stop bothering everyone until I get it home and can take a better look.
I’ll try and have another read through Rave info in the meantime.
Click to expand...

If it is the quantity servo you will need a reconditioned injection pump. But look closely at the emergency stop solenoid first of all, they do fail from time to time.
 
Your not bothering peeps, your more than welcome to ponder, question and argue as much as you like. If we weren't up for being bothered we wouldn't respond. Although some dogs are best left sleeping;):p:D
 
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