General: Volvo C70 - Losing Power/ Rough Engine after long journey

[richardls40]

Hello, this has happened a few times now, lastly yesterday evening.

2.5 Petrol C70, 2006

Long stretches of motorway and dual carriageways, e.g 100 miles - all good running perfectly.

Come of motorway and hit a set of traffic lights, the rumbles start, loss of power or intermitent power. If I coast / ease off it sometimes picks up again.

I hit a second set of lights and was stationery for a few minutes, absolute hell, little or no consistent power, rumble rumble, shake shake.

It is due a service ! Not convinced it will remedy the issue

[Dippydog]

Have you read the thread started by yomchi86? Does this sound like the same issue you're having?

[richardls40]

I have, his was a turbo but mine is not. However some possible clues to the issue in the initial post.

[Clan]

Originally Posted by richardls40

Hello, this has happened a few times now, lastly yesterday evening.

2.5 Petrol C70, 2006

Long stretches of motorway and dual carriageways, e.g 100 miles - all good running perfectly.

Come of motorway and hit a set of traffic lights, the rumbles start, loss of power or intermitent power. If I coast / ease off it sometimes picks up again.

I hit a second set of lights and was stationery for a few minutes, absolute hell, little or no consistent power, rumble rumble, shake shake.

It is due a service ! Not convinced it will remedy the issue

possibly the fuel pressure sensor, these can be troublesome.

[richardls40]

Is a replacement fuel pressure sensor an expensive part and will the labour be a lot ?

[Clan]

Originally Posted by richardls40

Is a replacement fuel pressure sensor an expensive part and will the labour be a lot ?

you don't change it unless you can prove it is faulty, It could get very expensive doing it that way..

[Tannaton]

Have you checked for any codes using Volvo compatible gear? Volvo petrol and diesel engines usually have several different "limp modes" not all of which generate a message or EML. For example on petrol turbo engines if one of the knock sensors fail or is disconnected, you have about 50% power but no lights or messages.

[yomchi86]

Yeah I'd 100% get it hooked up to a 'decent' diag kit if you've got one, Vida if at all possible, otherwise it is very much guesswork in all honesty.

Had I not had Vida (or my YouCanic diagnostic tools), I most definitely wouldn't have started by replacing the VVT Solenoids on mine. After working through each of the codes and replacing the most likely sensor, car is running like a dream (more so now it's 279bhp - Thanks Celtic Tuning).

If you've ever around the Leeds area, give me a shout. Would happily scan it for you.