Engine: D5: - narcoleptic diesel. What to replace?

moorgate · Aug 25th, 2015, 23:47

For the first time in many months, the Rescue Dog fell asleep on me. Of course this was in the worst possible place, just moving off to cross the wastes of the Vauxhall one-way system. The symptom is that after sitting for a while, idling perfectly, the engine dies as I press the throttle to move away. The death is slow- a couple of seconds or so - and the idle just fades away no matter what I do. Turn everything off, foot off the pedal, and the Dog bursts into life straight away. No extra messages and no recurrence, either - it's as if the car has a software crash and just needs a reboot.

Which part should I think about changing? On my old AMG this was the MAF sensors (bloody thing had two. 600 quid!), but it went from being fine to being unusable in 200 miles. The Dog has only cut out four times in six months, each time in different circumstances.

myfirstv70 · Aug 26th, 2015, 06:13

Can you vouch that the diesel filter is in good order and preferably a genuine/ good quality part?
HTH,
Nobby

moorgate · Aug 26th, 2015, 23:51

no, not absolutely - I've been billed for it being changed but not seen the part myself.

Why would that clog up and then permit an *immediate* restart though?

cheshired5 · Aug 27th, 2015, 01:17

Quote:

Originally Posted by moorgate

no, not absolutely - I've been billed for it being changed but not seen the part myself.

Why would that clog up and then permit an *immediate* restart though?

Debris is forced/sucked against the filter, engine stalls, debris falls away, engine can then start again.
If you're still sceptical, bleed the filter housing to see what comes out.

Aug 25th, 2015, 23:47	#1
moorgate Senior Member Last Online: Apr 24th, 2024 22:56 Join Date: Apr 2015 Location: london, ec2	narcoleptic diesel. What to replace? For the first time in many months, the Rescue Dog fell asleep on me. Of course this was in the worst possible place, just moving off to cross the wastes of the Vauxhall one-way system. The symptom is that after sitting for a while, idling perfectly, the engine dies as I press the throttle to move away. The death is slow- a couple of seconds or so - and the idle just fades away no matter what I do. Turn everything off, foot off the pedal, and the Dog bursts into life straight away. No extra messages and no recurrence, either - it's as if the car has a software crash and just needs a reboot. Which part should I think about changing? On my old AMG this was the MAF sensors (bloody thing had two. 600 quid!), but it went from being fine to being unusable in 200 miles. The Dog has only cut out four times in six months, each time in different circumstances.

Aug 26th, 2015, 06:13	#2
myfirstv70 Senior Member Last Online: Today 22:12 Join Date: Dec 2008 Location: Lincoln	Start with the easy stuff.... Can you vouch that the diesel filter is in good order and preferably a genuine/ good quality part? HTH, Nobby

Aug 26th, 2015, 23:51	#3
moorgate Senior Member Last Online: Apr 24th, 2024 22:56 Join Date: Apr 2015 Location: london, ec2	no, not absolutely - I've been billed for it being changed but not seen the part myself. Why would that clog up and then permit an immediate restart though?

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