When using my original BOV my car goes to 1.4bar, when using VTA from forge it goes to 1.25 bar,of course its colder here, but can anybody explain this ?? I think 1.4 is a little too much for the TD04 (MY2000, old shape, European 220bhp, now making 260bhp with Unichip.)
But some people say the VTA will make my car rich on lift off.
Using it for almost a year now with no problems.
Only thinf I'm concerned is the fuel consumption with the VTA and the high boost when using back the original BOV;

 

Sounds to me your VTA is leaking boost....

Richard

 

Mines didn't change when I fitted a Forge VTA

Must have a leak somewhere

How old is the car? Did you use a new gasket ?

 

I use now the Forge VTA, makes to 1.25bar, seems the solenoid and bleed valve was a little dirty....

Has someone detected more fuel cons when using a VTA ???