D5 (D5244T to 2005) - intermittent fault

micksmad · Mar 31st, 2013, 19:06

Hi, I have a 2002 s80 d5. When the engine reaches temp but the air temp is above 5 degreesthe car sometimes feels like it's choking back if I throttle up its stops choking but kicks out lots of black smoke for a little while if I ease off instead of booting it the car just puffs smoke for a little but the power is there when I need it. Egr has had a clean for different cleaners have been added full service as usual including diesel filter, but to no avail, it has had diagnostics at local garage nothing found it dies have a small hole in the flexi part of the exhaust and a small intercooler leak the egr was absolutely filthy with soit please help the cars ok when the air temp is cold below 5 degrees it's annoying

steveshaw · Apr 4th, 2013, 08:37

Have a look at the rubber hose at the inlet of the turbo, these can go soft and collapse when the turbo is sucking hard, so it sucks flat on full throttle, then comes back to shape with light throttle.
When the temperature is low, the rubber may become a little stiffer preventing it from collapsing.
Give it a squeeze by hand if its really soft and oily, this could be a candidate.
You could also try one quick run without an air filter as this will slightly reduce the vacuum applied to the hose, especially if you have a dirty filter.

Mar 31st, 2013, 19:06	#1
micksmad New Member Last Online: Apr 7th, 2013 13:12 Join Date: Dec 2012 Location: brigg	intermittent fault Hi, I have a 2002 s80 d5. When the engine reaches temp but the air temp is above 5 degreesthe car sometimes feels like it's choking back if I throttle up its stops choking but kicks out lots of black smoke for a little while if I ease off instead of booting it the car just puffs smoke for a little but the power is there when I need it. Egr has had a clean for different cleaners have been added full service as usual including diesel filter, but to no avail, it has had diagnostics at local garage nothing found it dies have a small hole in the flexi part of the exhaust and a small intercooler leak the egr was absolutely filthy with soit please help the cars ok when the air temp is cold below 5 degrees it's annoying

Apr 4th, 2013, 08:37	#2
steveshaw Senior Member Last Online: Mar 23rd, 2017 15:35 Join Date: Dec 2003 Location: Driffield	Have a look at the rubber hose at the inlet of the turbo, these can go soft and collapse when the turbo is sucking hard, so it sucks flat on full throttle, then comes back to shape with light throttle. When the temperature is low, the rubber may become a little stiffer preventing it from collapsing. Give it a squeeze by hand if its really soft and oily, this could be a candidate. You could also try one quick run without an air filter as this will slightly reduce the vacuum applied to the hose, especially if you have a dirty filter.

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