tunovlov

S60 2.4 T5 Over Boosting

6 posts in this topic

Hi

I recently bought a 2006 model S60 T5 and have been using Torque app to check that it is ok.

It is showing no fault codes but is over boosting. Today it peaked at about 44 PSI!!!

It drives ok and does not falter or hold back but it does not feel like it has as much grunt as my V40 T4 ( which surprises everyone :D ).

With some difficulty I have been able to move the actuator arm ( strong spring? ) so hopefully the vanes in the turbo are free.

Could the boost control valve cause too much boost?

Cheers

 

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I think you need to check it correctly as I'm sure you're wrong and it's not boosting to 44 PSI. 

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44 PSI = 3.0 bar = cracked block! As Tim says, I very much doubt it's boosting to 3.0 bar. Are you using a mechanical boost gauge?

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14 hours ago, Tim Williams said:

I think you need to check it correctly as I'm sure you're wrong and it's not boosting to 44 PSI. 

Hi Tim

Thanks for your advice, I was hoping to hear from you. I should have said "according to Torque it is boosting to 44PSI."

I think it would have gone bang before reaching 44PSI wouldn't it, so hopefully I am just getting a false reading?

When driving the car there is nothing obviously wrong with it although due to the apparent problem I have not been really booting it.

Torque seems to work fine on my V40 T4 which it indicates boosts up to 13PSI.

I have connected a tyre pump to the actuator which seems to be working ok with plenty of movement on the linkage.

A new BCV is on its way. The one on the car looks like it is probably the original so could probably do with replacing anyway.

Car has done 101000 miles and does not show any signs of having been ragged.

Thanks

Roland

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11 hours ago, Muhammad said:

44 PSI = 3.0 bar = cracked block! As Tim says, I very much doubt it's boosting to 3.0 bar. Are you using a mechanical boost gauge?

Hi Muhammad

I do not have a mechanical gauge but have been using Torque app.

I hope it is just that Torque has been giving me a false reading. I think 44PSI is around 4 times the normal maximum boost

and as you say if it had been boosting that high it would have gone bang in a big way.

Cheers

Roland

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I had the same on my S70R with Torque App for whatever reason and panicked here like crazy.
It was showing something like 1.9 bar.
... but to be on the safe side, get it checked as soon as possible!
We found out after measuring, that it was not 1.9, but 1.5 at peak and 1.4 most of the time, which was also a bit too much for the standard 18T.
On the other hand I found out, why the car was going like hell! ^^
After a few emails the car went back to the previous owner.

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