Engine: 70 T5: Need some advice on Turbo pipes from Volvo

[Jp003]

Hi

I have recently had a lot of trouble with my C70 2.3T5 Coupe with hesitation on acceleration. I have changed the Turbo control valve, cleaned the MAF sensor, cleaned the Turbo air intake, cleaned the PTC sensor but still no change.

I noticed the Turbo pipes were perishing so I decided to order some new parts from Volvo. I ordered the 3 pipes for the turbo control valve to turbo and turbo intake and turbo waste gate. Also from the exhaust manifold to the turbo.

So the pipes came and I started to rip out the old and install the new. All was going well.

Volvo sent me one pipe with a red collar on which had a bigger diameter than the other 3 meter lengths of pipe which fits onto the red port on the Turbo control valve and connects directly to the Turbo. The other two old pipes on the Turbo control valve (Yellow and Blue tag) have the same diameter as the new red pipe. Yet the new pipe to replace (Yellow and Blue tagged pipes) is a smaller diameter. In fact it is exactly the same size as the pipe from the Exhaust manifold to the Turbo!!!

I called Volvo and checked that I had the right pipes and was told i did. Have a look at the pic and see what you think.

The new pipes have made no difference to my hesitation problem and I'm now wondering if I have a problem with the Turbo waste gate instead.

If anyone can tell me if these pipes are okay or will make a difference to the operation on the Turbo I would be very grateful.

Also If anyone has any ideas why I'm suffering with hesitation on acceleration I would be grateful.

Kind regards

JP

3 x original pipes and 2 x new ones in the photo

IMG_7216.jpg