Diesel Running Problems: What's going on?
 

Hi all,

Have a 2001 2.0 diesel conneiseur.

Got recovered from the roadside the other week.... Cars been in the garage since but can't actually figure out what's happening - hoping the hive mind can figure it out...

Was on motorway doing 70 on cruise control. Felt car almost pulsing with power very gently. Knocked cruise control off as was approaching build up of traffic and after, as I accelerated away, it intensified. Felt like the car was pulling away to get up to speed on cruise control then dropping away, speeding up then dropping away. It would ease off when accelerating but would start again as soon as I relaxed on the throttle. It would also stop when I took my foot off the accelerator.
Eventually tried to manage it by allowing car to drop to about 60 and accelerate to 80 just to stop the jolting.
After doing this for about 10 mins when accelerating the power dropped off completely. Pulled over to hard shoulder. Turned off, turned on again. Accelerated and got to about 30 before the power dropped off again.
Gave up and got recovered.
Roadside mechanic reckoned that the turbo had gone.
Dropped it off with my garage who have tested the turbo and it appears to be ok - they've also just tested the injectors and they are ok also.
Garage are kind of at a loss now.... Hopefully someone out there has a starter for 10....

Cheers

Andy

Sent from my EML-L29 using Tapatalk

Under bonnet pump or in tank fuel pump problem :shrug:

Turn ignition on and take filler cap off, put your ear to the filler and listen for a jum. If its not there, pump isn't working. If it is check out engine pump which looks a bit like a coil off a petrol car. Its bolted to side of battery box, agaon turn on ignition and feel the pump, you should feel if its working, if it's not, give it a tap with the handle of a screwdriver and see if it comes back to life.

Could the fly-by-wire accelerator pedal have anything to do with this? Is your ECU wet/getting confused by faulty signals and messages? Can cruise control be isolated/disabled?

Wet ECM is my best guess here.......time to check your plenum ;)

Brian :D

Thread title expanded to illustrate the nature of the problem and topic moved to the Technical Help Forum for more focused coverage.

Brian.
Quite a few members will see this over the next few months :eek: if those plenums are not checked and dealt with, mine will be ok as I have recently cut 15mm of the tubes under the car. ;)

The one under the servo.
https://i.imgur.com/zhR3kJYl.jpg1

https://i.imgur.com/SPwkM0Rl.jpg2

ECU side
https://i.imgur.com/OHcGl6il.jpg3

Hi all,
Thanks for the help - all passed on to the garage.... Definitely not the ECM - plenums clear and no water there.
Reckons it could be a valve failing in the diesel pump - is that a possibility?
Andy

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Diesel problem
 

May be of use I had problem with the fuel pressure sensor fitted at the rear of the high pressure pump at the front of the engine.Due to its cost can you get one of the members near at hand to give it a T4 check to diagnose your problem.