Boost Control Solenoid (n75)?

[westytwo]

I have a 99 plate 110 bhp diesel, and have the dreaded power loss. I vary rarely get boost but when I do the engine only revs to 3000 rpm and then its like a switch has been flicked. I have replaced the MAF, all the small vacuum hoses to the actuator, boost solenoid etc but still have not cured it. I can see the actuator arm moving up and down when you rev the engine, so if the boost control solenoid was faulty would the actuator arm still move?? I have read lots of threads about people who have the same problem however all the other people who have the same problem seem to be able to turn there engine off and on and power is restored this does not happen on mine. I can turn the engine off and on numerous times and still have no power. I seem to get power when the car feels like it help!!!

[Jayton]

The other people's problem appear to be the turbo vanes sticking, mines done that twice now but I do a lot of town driving and hardly rev it past 3k.

[ade]

I have a 99 plate 110 bhp diesel, and have the dreaded power loss. I vary rarely get boost but when I do the engine only revs to 3000 rpm and then its like a switch has been flicked. I have replaced the MAF, all the small vacuum hoses to the actuator, boost solenoid etc but still have not cured it. I can see the actuator arm moving up and down when you rev the engine, so if the boost control solenoid was faulty would the actuator arm still move?? I have read lots of threads about people who have the same problem however all the other people who have the same problem seem to be able to turn there engine off and on and power is restored this does not happen on mine. I can turn the engine off and on numerous times and still have no power. I seem to get power when the car feels like it help!!!

Are u sure the new maf is not faulty? We went through about 3 or 4 before we found one that worked. Do you have access to a full vag com?

[westytwo]

I have a 99 plate 110 bhp diesel, and have the dreaded power loss. I vary rarely get boost but when I do the engine only revs to 3000 rpm and then its like a switch has been flicked. I have replaced the MAF, all the small vacuum hoses to the actuator, boost solenoid etc but still have not cured it. I can see the actuator arm moving up and down when you rev the engine, so if the boost control solenoid was faulty would the actuator arm still move?? I have read lots of threads about people who have the same problem however all the other people who have the same problem seem to be able to turn there engine off and on and power is restored this does not happen on mine. I can turn the engine off and on numerous times and still have no power. I seem to get power when the car feels like it help!!!

Are u sure the new maf is not faulty? We went through about 3 or 4 before we found one that worked. Do you have access to a full vag com?

I might take it back to euro car parts and see if they will exchange it for another one and try that. The one that I got has a different part number to the one I took off and looks slightly different but I looked on the Bosch website and the new one is just an updated version. I dont have access to Vagcom do you live anywhere near Staffordshire lol. Its frustrating when you try things and they dont work!

[westytwo]

The other people's problem appear to be the turbo vanes sticking, mines done that twice now but I do a lot of town driving and hardly rev it past 3k.

 

Did you remove and clean yours yourself I have heard its quite a task? When yours was sticking did you notice if you had any movement on your actuator arm?? Because I do which makes me think the vanes are opening and closing??