Diesel go slow

gary1638 · Jun 23rd, 2005, 14:43

Hi, my wife's V40 diesel, 2001 model, has become hesitant during running, and is pushing out black smoke. Airflow meter seems to be top of the 'this bits gone wrong' chart, anything else I should be looking at?

Ta

Gary

woody-som · Jun 23rd, 2005, 18:38

black smoke points to incomplete combustion. When was the air filter changed?

Or too much fuel being delivered, but not sure how to correct this one on the V40 yet

Jun 23rd, 2005, 19:22

or blown turbo seals? has it just started doing it?

whats the mileage, age, engine type?

gary1638 · Jun 23rd, 2005, 20:56

Air filter as new. Not turbo. It's the latest type of diesel fitted to the V40, direct injection, 115bhp.

Jun 24th, 2005, 07:46

hmmm, dunno much about the direct injection engines, sorry

think its probably diagnostics job

deffinately no turbo tho? i thought all deisles had turbo these days, ha-ho.

i do know that Di engine opperate at much higher pressure than standard, so perhaps headgasket failure? check for loss of water or floaty wax in the water

exesive consumption of oil, etc

it could be overfueling, but thats an ECU job

whats your mileage? (re headgasket)

gary1638 · Jun 25th, 2005, 06:18

Alfonz,

When I said not turbo, what I meant was its not the turbo causing the problem. Sorry! It has covered 80,000 miles and has just had the cambelt replaced. This problem was looked at at the same time, and it is the garages opinion that it is the airflow meter. I had just wondered if anyone had come across this problem before. Will be fitting a new bit today, if that don't work it'll be off to the dealers!

Thanks

Gary

Rooster · Jun 25th, 2005, 12:32

EGR valves sticking needs taking out and cleaning, its located under the intake pipe on the intake manifold long tube thing, 3 bolts holding it in place. Be careful removing it cos it will be tight.

It won't be turbo cos when they fail on them they fail big style.

gary1638 · Jun 27th, 2005, 21:03

Problem solved! Thanks to Rooster, I looked at the intake manifold, and, whilst it wasn't the EGR, above it where the air intake pipe joins the intake manifold there is an item that had a broken casing and was letting in air directly into the manifold. I'm sure this has a posh name, it is a sort of vacumn operated butterfly valve. And its a third the price of an air flow meter.

result!

Jun 28th, 2005, 08:35

nice one rooster,

Jun 23rd, 2005, 14:43	#1
gary1638 Member Last Online: Sep 2nd, 2011 13:21 Join Date: Nov 2002 Location: verwood	Diesel go slow Hi, my wife's V40 diesel, 2001 model, has become hesitant during running, and is pushing out black smoke. Airflow meter seems to be top of the 'this bits gone wrong' chart, anything else I should be looking at? Ta Gary

Jun 23rd, 2005, 18:38	#2
woody-som Member Last Online: Jun 28th, 2011 19:14 Join Date: Dec 2004 Location: CHARD	RE: Diesel go slow black smoke points to incomplete combustion. When was the air filter changed? Or too much fuel being delivered, but not sure how to correct this one on the V40 yet

Jun 23rd, 2005, 19:22	#3
alfonzobonzo Guest Location:	RE: Diesel go slow or blown turbo seals? has it just started doing it? whats the mileage, age, engine type?

Jun 23rd, 2005, 20:56	#4
gary1638 Member Last Online: Sep 2nd, 2011 13:21 Join Date: Nov 2002 Location: verwood	RE: Diesel go slow Air filter as new. Not turbo. It's the latest type of diesel fitted to the V40, direct injection, 115bhp.

Jun 24th, 2005, 07:46	#5
alfonzobonzo Guest Location:	RE: Diesel go slow hmmm, dunno much about the direct injection engines, sorry think its probably diagnostics job deffinately no turbo tho? i thought all deisles had turbo these days, ha-ho. i do know that Di engine opperate at much higher pressure than standard, so perhaps headgasket failure? check for loss of water or floaty wax in the water exesive consumption of oil, etc it could be overfueling, but thats an ECU job whats your mileage? (re headgasket)

Jun 25th, 2005, 06:18	#6
gary1638 Member Last Online: Sep 2nd, 2011 13:21 Join Date: Nov 2002 Location: verwood	RE: Diesel go slow Alfonz, When I said not turbo, what I meant was its not the turbo causing the problem. Sorry! It has covered 80,000 miles and has just had the cambelt replaced. This problem was looked at at the same time, and it is the garages opinion that it is the airflow meter. I had just wondered if anyone had come across this problem before. Will be fitting a new bit today, if that don't work it'll be off to the dealers! Thanks Gary

Jun 25th, 2005, 12:32	#7
Rooster Speed freak Last Online: Apr 3rd, 2020 22:04 Join Date: Nov 2003 Location: Yorkshire	RE: Diesel go slow EGR valves sticking needs taking out and cleaning, its located under the intake pipe on the intake manifold long tube thing, 3 bolts holding it in place. Be careful removing it cos it will be tight. It won't be turbo cos when they fail on them they fail big style. __________________ 04 XC90 D5 --- Big bus 00 pug 306HDi --- Run about 88 pug 309GTi --- Project track car 07 CB600 Hornet --- 2 wheel fun

Jun 27th, 2005, 21:03	#8
gary1638 Member Last Online: Sep 2nd, 2011 13:21 Join Date: Nov 2002 Location: verwood	RE: Diesel go slow Problem solved! Thanks to Rooster, I looked at the intake manifold, and, whilst it wasn't the EGR, above it where the air intake pipe joins the intake manifold there is an item that had a broken casing and was letting in air directly into the manifold. I'm sure this has a posh name, it is a sort of vacumn operated butterfly valve. And its a third the price of an air flow meter. result!

Jun 28th, 2005, 08:35	#9
alfonzobonzo Guest Location:	RE: Diesel go slow nice one rooster,

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