S80 T6 engine hesitation

jerang · Aug 29th, 2011, 19:44

Can anyone help? I have a 2002 T6 which runs a dream 'normally' as soon as I need full throttle for overtaking the engine seems to constantly cut out. It seems to surge with full power then die for a second then surge again. It repeats this until I reduce the throttle pressure. Only happens when engine is under full pressure. Any suggestions??? Thanks

spokoluzik · Aug 29th, 2011, 21:45

fuel filter??

jerang · Aug 30th, 2011, 09:02

Had a new fuel filter fitted at last service only 3000miles ago as I thought that might be the cause...possibly I have been told it could be the turbo boost control solenoid but I know nothing about this part....

jerang · Aug 30th, 2011, 09:03

Meant to mention, I had a diagnostic done and no fault codes were found.

jerang · Sep 9th, 2011, 13:09

fitted the new turbo boost valve (cost £48) and tested it on the motorway, does she go now or does she go...... its like taking the handbrake off and unleashing the beast..
Just have to be careful now to keep the licence clean.
So easy to fit the TBV and easy to find next to the air filter box

costajus · Sep 11th, 2011, 16:17

Quote:

fitted the new turbo boost valve (cost £48)

Was this bought from Volvo and do you have a part number please? I have the exact same problem. Also is that the valve by the air filter box?

Thanks in advance!

jerang · Sep 13th, 2011, 10:27

bought it through a volvo specialist (not main dealer) near Wigan.
It is attached to the engine side of the air box with three black hoses and one electrical conector.
Part number for the genuine volvo part is 30670448 but it is written on the side of the valve in white writting so double check it is the same one on yours. Very easy to fit but it has been recommended to me that after fitting you disconect the battery for 30mins to reset.

bodger · Sep 13th, 2011, 12:14

I have a similar problem on my 2.4T V70, but not quite as bad as you describe.

There's an other issue as well, I wonder if you had this prior to fixing as I think it may be connected.

If I cruise at a steady speed for example 60-70 mph there is an occasional, very slight misfire...

jerang · Sep 13th, 2011, 12:21

no i never experienced a misfire i'm afraid.
Could urs be linked to the fuel pressure sensor, or even as simple as a faulty plug or blogged fuel filter???

jerang · Sep 13th, 2011, 12:23

Sorry Bodger, meant to add? Have you had any fault codes read yet? Or any warning lights on the dash? I had neither on mine so gambled on it being the TBV after trawling the forums.

Aug 29th, 2011, 19:44	#1
jerang New Member Last Online: Mar 28th, 2012 14:28 Join Date: Sep 2010 Location: hindley, Lancs	S80 T6 engine hesitation Can anyone help? I have a 2002 T6 which runs a dream 'normally' as soon as I need full throttle for overtaking the engine seems to constantly cut out. It seems to surge with full power then die for a second then surge again. It repeats this until I reduce the throttle pressure. Only happens when engine is under full pressure. Any suggestions??? Thanks

Aug 29th, 2011, 21:45	#2
spokoluzik Trader Last Online: Dec 6th, 2023 19:46 Join Date: Jun 2010 Location: london	fuel filter?? __________________ http://volvodiagnostic.com/

Aug 30th, 2011, 09:02	#3
jerang New Member Last Online: Mar 28th, 2012 14:28 Join Date: Sep 2010 Location: hindley, Lancs	Had a new fuel filter fitted at last service only 3000miles ago as I thought that might be the cause...possibly I have been told it could be the turbo boost control solenoid but I know nothing about this part....

Aug 30th, 2011, 09:03	#4
jerang New Member Last Online: Mar 28th, 2012 14:28 Join Date: Sep 2010 Location: hindley, Lancs	Meant to mention, I had a diagnostic done and no fault codes were found.

Sep 9th, 2011, 13:09	#5
jerang New Member Last Online: Mar 28th, 2012 14:28 Join Date: Sep 2010 Location: hindley, Lancs	fitted the new turbo boost valve (cost £48) and tested it on the motorway, does she go now or does she go...... its like taking the handbrake off and unleashing the beast.. Just have to be careful now to keep the licence clean. So easy to fit the TBV and easy to find next to the air filter box

Sep 13th, 2011, 10:27	#7
jerang New Member Last Online: Mar 28th, 2012 14:28 Join Date: Sep 2010 Location: hindley, Lancs	bought it through a volvo specialist (not main dealer) near Wigan. It is attached to the engine side of the air box with three black hoses and one electrical conector. Part number for the genuine volvo part is 30670448 but it is written on the side of the valve in white writting so double check it is the same one on yours. Very easy to fit but it has been recommended to me that after fitting you disconect the battery for 30mins to reset.

Sep 13th, 2011, 12:14	#8
bodger Member Last Online: May 25th, 2021 12:10 Join Date: Aug 2010 Location: St Helens	I have a similar problem on my 2.4T V70, but not quite as bad as you describe. There's an other issue as well, I wonder if you had this prior to fixing as I think it may be connected. If I cruise at a steady speed for example 60-70 mph there is an occasional, very slight misfire...

Sep 13th, 2011, 12:21	#9
jerang New Member Last Online: Mar 28th, 2012 14:28 Join Date: Sep 2010 Location: hindley, Lancs	no i never experienced a misfire i'm afraid. Could urs be linked to the fuel pressure sensor, or even as simple as a faulty plug or blogged fuel filter???

Sep 13th, 2011, 12:23	#10
jerang New Member Last Online: Mar 28th, 2012 14:28 Join Date: Sep 2010 Location: hindley, Lancs	Sorry Bodger, meant to add? Have you had any fault codes read yet? Or any warning lights on the dash? I had neither on mine so gambled on it being the TBV after trawling the forums.

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