I just did a full hose job, replaced some solenoids, and a downpipe, and now my car is finally boosting a 11-9-11 boost pattern, but after it goes back to 11 on the second turbo, it dies down until it hits around 7-8psi, so what I figure is that I am using cheap Help checkvalves, could it be that the system is not holding enough vacuum to power the system until redline?

Thanks,

Ravi

 

The turbo control actuator uses both vacuum and pressure.
You have to check both systems.

 

The Help brand check valves are in my opinion iffy. I used them before but found that they don't always work. That is, they are intermittent and I highly don't recommend using them for the pressure tank. The pressure chamber gets it's pressure directly from the y-pipe, long before the IC, and is heated to high for the Help check valve. Go to mazda and order the correct check valves. Just order two, the Pressure and the Vacuum to get you bye and back boosting consistently.

Oh yeah, congratulations on fixer her.

 

hey i'm kinda curious what was your boost problem before.. u got back the 11-9-11 boost patterns with the drop to 6-7psi later on in the secondaries....seems like my car shares the same problem. But what was wrong before and did you fix the problem now? (completely functional) please let me know thanks in advance.