2003 V40 115bhp diesel surging

V40DSchariot · Oct 11th, 2017, 19:56

I'd like to tug on your coat about something.

Started today on the motorway with what sounded like the heater fan blowing fast and slow repeatedly. (Which the fan does need looking at, so not totally out the ordinary)

Then noticed a slight surging when keeping a steady speed coupled with black plumes out the exhaust in time with the surging.
I was getting off at the next junction anyway, but nothing on slowing down but pulling off from the roundabout starting at around 2000rpm, if slowly accelerating a strong surging/backing off with the black plumes on surging and a diesel rattle on backing off.

The real strange thing when surging is a noise that i've never come across with any engine, what can only be described as the sound of pebbles on a beach when a strong tide washes over them. It sounds similar to the heater fan on full within the cab, like the pebbles with window down or outside car.

Under load black plumes on surging, stationary no smoke but still the pebble sound when blipping revs then normal sound until 2500rpm when the sound of pebbles is constant. Under hard acceleration no surging but a real load pebble sound.
When idling the revs are steady, when keeping at any revs, say 2500rpm under load and car surging the revs are again steady.

Any ideas anyone? Anyone experienced similar? I was thinking maybe the diesel pump on it's way out.

It's hard to tell, but it sounds like the sound is coming from the belt side of the engine.

Thanks in advance

aldred309uk · Oct 12th, 2017, 19:00

I had surging caused by a dodgy egr valve. I blocked it off and not had the issue since.

V40DSchariot · Oct 12th, 2017, 19:58

Sorted the problem. Had a split hose going to the intercooler
Pinched a hose off the donar T4, not exactly the same but will do till a replacement can be found

Posted a short clip on youtube to show the weird noise that this caused.

https://youtu.be/kEQCVW3y3i0

skyship007 · Oct 17th, 2017, 17:00

Quote:

Originally Posted by aldred309uk

I had surging caused by a dodgy egr valve. I blocked it off and not had the issue since.

That invalidates the insurance if you can't get an approval and they are only valid for race tracks.

The EGR on a diesel will not block suddenly, it will cause a significant lag when booted well before it blocks up.
Never had to clean mine yet, as a good session on the autobahn burns it clean.

Oct 11th, 2017, 19:56	#1
V40DSchariot Master Member Last Online: Apr 3rd, 2022 15:09 Join Date: May 2013 Location: Derbys	2003 V40 115bhp diesel surging I'd like to tug on your coat about something. Started today on the motorway with what sounded like the heater fan blowing fast and slow repeatedly. (Which the fan does need looking at, so not totally out the ordinary) Then noticed a slight surging when keeping a steady speed coupled with black plumes out the exhaust in time with the surging. I was getting off at the next junction anyway, but nothing on slowing down but pulling off from the roundabout starting at around 2000rpm, if slowly accelerating a strong surging/backing off with the black plumes on surging and a diesel rattle on backing off. The real strange thing when surging is a noise that i've never come across with any engine, what can only be described as the sound of pebbles on a beach when a strong tide washes over them. It sounds similar to the heater fan on full within the cab, like the pebbles with window down or outside car. Under load black plumes on surging, stationary no smoke but still the pebble sound when blipping revs then normal sound until 2500rpm when the sound of pebbles is constant. Under hard acceleration no surging but a real load pebble sound. When idling the revs are steady, when keeping at any revs, say 2500rpm under load and car surging the revs are again steady. Any ideas anyone? Anyone experienced similar? I was thinking maybe the diesel pump on it's way out. It's hard to tell, but it sounds like the sound is coming from the belt side of the engine. Thanks in advance __________________ 2016 V60 SE Lux Nav 2001 V40 T4 S - All The Fun of The Fair The big print giveth and the small print taketh away Last edited by V40DSchariot; Oct 11th, 2017 at 19:57. Reason: Thanks

Oct 12th, 2017, 19:00	#2
aldred309uk Member Last Online: Apr 20th, 2021 22:33 Join Date: Sep 2015 Location: Blackburn	I had surging caused by a dodgy egr valve. I blocked it off and not had the issue since. __________________ Phase 2 1.9tdi V40

Oct 12th, 2017, 19:58	#3
V40DSchariot Master Member Last Online: Apr 3rd, 2022 15:09 Join Date: May 2013 Location: Derbys	Sorted the problem. Had a split hose going to the intercooler Pinched a hose off the donar T4, not exactly the same but will do till a replacement can be found Posted a short clip on youtube to show the weird noise that this caused. https://youtu.be/kEQCVW3y3i0 __________________ 2016 V60 SE Lux Nav 2001 V40 T4 S - All The Fun of The Fair The big print giveth and the small print taketh away

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)