Steve g· Registered
There is going to be a million different opinions on this one... but it’s been proven and solved by replacing the Mac style valve with a pierburg solenoid... GFB valves don’t work properly with a Mac style valve. 2261 is the dead giveaway that’s the issue.As far as I can tell? I don't HEAR any leaking boost when the code happens, or when it looses boost. Not like when I didn't have the clamp tight enough on the intercooler reso delete pipe installed, that you could CLEARLY hear the boost leaking. And it seems to change when I adjust how much I am venting. When set to full circulate, I get a longer stint of driving with boost, set to full open, I get about 15 minutes. 50/50 I get about an hour. Now if I drive it easy at 50/50, it doesn't do this, but after an hour, if I get on it, I lose boost almost immediately after I hear the valve open and vent. It is very similar to when you cold start the car and have no boost till it warms up.