Surging engine

HalV40 · Feb 22nd, 2020, 20:45

Driving along, my diesel 'surges'. Feels like it's running out of fuel. I have changed the fuel filter and I thought the fault had gone. The turbo is whistling but still boosts, am I looking for an air leak?

P156KWJ · Feb 23rd, 2020, 09:52

Quote:

Originally Posted by HalV40

Driving along, my diesel 'surges'. Feels like it's running out of fuel. I have changed the fuel filter and I thought the fault had gone. The turbo is whistling but still boosts, am I looking for an air leak?

Any pattern to it? Mine would briefly lose revs when accelerating at about 2,800-3,000 rpm and it was a faulty MAF sensor

HalV40 · Feb 23rd, 2020, 16:09

Hmm, doesn't seem to matter if engine is cold or warm, seems to happen most in the 1500 to mid 2000 rev range. I unplugged the EGR when I first got the car as it was losing power around 1800 rpm but that was 3 years ago. Doesn't seem to happen 'quickly' enough to be an electrical problem. I'm thinking fuel delivery or air leak.

Baffler · Feb 24th, 2020, 14:32

Possible fuel starvation (blocked fuel tank pick-up) or beginnings of a small boost leak (hose under the turbo is the usual suspect).

HalV40 · Mar 7th, 2020, 20:44

Quick update, car has behaved fine since posting this fault. Very odd (but a nice relief)!
Different subject - how easy is it to swap a turbo unit on this model on a driveway, any special tools?

Feb 22nd, 2020, 20:45	#1
HalV40 Junior Member Last Online: Sep 27th, 2020 17:45 Join Date: May 2017 Location: Lichfield	Surging engine Driving along, my diesel 'surges'. Feels like it's running out of fuel. I have changed the fuel filter and I thought the fault had gone. The turbo is whistling but still boosts, am I looking for an air leak?

Feb 24th, 2020, 14:32	#4
Baffler Premier Member Last Online: Today 19:44 Join Date: Dec 2002 Location: Co. Limerick, Ireland	Possible fuel starvation (blocked fuel tank pick-up) or beginnings of a small boost leak (hose under the turbo is the usual suspect). __________________ Liam... '96 854 TDI SE, '99 V70 2.5D S, '05 C70 2.0T Collection, '05 S80 2.0T SE, '15 V70 D4 SE Lux Nav.

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Feb 23rd, 2020, 16:09	#3
HalV40 Junior Member Last Online: Sep 27th, 2020 17:45 Join Date: May 2017 Location: Lichfield	Hmm, doesn't seem to matter if engine is cold or warm, seems to happen most in the 1500 to mid 2000 rev range. I unplugged the EGR when I first got the car as it was losing power around 1800 rpm but that was 3 years ago. Doesn't seem to happen 'quickly' enough to be an electrical problem. I'm thinking fuel delivery or air leak.

Mar 7th, 2020, 20:44	#5
HalV40 Junior Member Last Online: Sep 27th, 2020 17:45 Join Date: May 2017 Location: Lichfield	Quick update, car has behaved fine since posting this fault. Very odd (but a nice relief)! Different subject - how easy is it to swap a turbo unit on this model on a driveway, any special tools?

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