Turbo Boost Pressure Valve

[Dan Dare]

Hello all,As the heading says Turbo Boost Pressure Valve,My question is "Where Is It" The vehicle is a 2004 Galaxy 2.1 Diesel manual.

 

Any help will be appreciated as this is all new to me

 

regards

John

[seatkid]

The vehicle is a 2004 Galaxy 2.1 Diesel manual.

No such engine exists! If its a diesel it should be a 1.9L. Could be 115, 130 or 150bhp.

 

 

The TCS - Turbo Control Solenoid (N75) is located behind a heatshield on the engine bulkhead behind the EGR valve

[chrispb123456]

Hi and welcome to the forum

Just to confirm you do mean a MK2 1.9TDI

If so the valve (N75) controlling the amount of vacuum supplied to the turbo actuator is behind the heat shield on the bulkhead, there are three valves here from left to right N75, N239, N18.

The other two valves control manifold flap and EGR valve respectively.

Some pics to help explain.

 

[Dan Dare]

The vehicle is a 2004 Galaxy 2.1 Diesel manual.

No such engine exists! If its a diesel it should be a 1.9L. Could be 115, 130 or 150bhp.

 

 

The TCS - Turbo Control Solenoid (N75) is located behind a heatshield on the engine bulkhead behind the EGR valve

Thanks for the quick reply

 

Sorry you are right my mistake it is a 1.9 is it the heat shield that has 3 plastic junctions behind it that have vacume pipes and electrical connectors going to them? If so which one of the three is it or am I looking in the wrong place,can this item be cleaned?

sorry to ask a lot of questions but as mentioned these vehicles are new to me

 

I dont suppose there a re any pictures on the forum of this item??

thanks again John

Edited May 7, 2012 by Dan Dare

[t-aslam]

Just about to replace my N75 valve as all of a sudden I'm getting a flat engine if I push her over 3000 revs. My gal has done 238k mostly motorway miles.

Just for reference I've been informed the old part number was 1J0906627A but has been superceded with 1K0906627E.

[chrispb123456]

Are you sure that you need this as it is around the

[t-aslam]

Hi,

Yeh I ran a scan and got two fault codes:

17552 - Mass Air Flow Sensor (G70): Open or Short to Ground

P1144 - 35-00 - -

 

17965 - Charge Pressure Control: Positive Deviation

P1557 - 35-00 - -

 

I already had a spare Bosch maf I swapped out a few years ago as a misdiagnosis so I swapped it out again.

 

After this I hit the motorway again and as soon as I got 3000 revs she went gutless again.

[t-aslam]

Oh and I did clear the codes before I hit the motorway that time.

[chrispb123456]

Positive deviation means you have overboost this is most likely the turbo vanes sticking, you can confirm this by collecting some live data with VCDS and check the specified boost pressure against actual pressure

 

The MAF with throw this code when engine has been run with MAF disconnected, check the wiring in the multiplug.

[t-aslam]

Oh yes I remember I had the air box off last week while replacing the brake master cylinder and had to move the car while the box was off. So that explains that. I'm going to fit the N75 and see how I go from there.

[t-aslam]

Ok replaced the N75 and so far so good,

However that said its only been tested on local roads and I'll thrash it on the m4 later tonight.

The turbo spools up a lot smoother and kinda feel as if the car has gained some more muscle.