Just fitted a forge dump valve to my 207 gti, it is an atmospheric valve so should make a sound when coming off the gas but doesn’t.
I do have the dreaded depollution system faulty message occasionally but when I reset everything the turbo is working but still no sound from the valve.
Does anyone know if the depollution system thing could be stopping it from working correctly?
Dump Valve issue
Moderator: RichardW