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Mine is only hooked up with boost, the hose goes straight from the turbo housing to the top of the IP.

Are you saying that you have no vacuum hooked up at all? Did yours come from the factory with all the hoses and solenoids?
My boost hose has a "T" in it for a boost gauge. Other than that, the boost side is stock. If I hook the vacuum up with the solenoid in play, it removes vac (and extra fuel) just about the time the turbo spools up.


Correct, the only engine part that works off of vacume is the EGR valve which I don't even have that hooked up. There are no vacume solenoids needed to run this motor correctly.
One boost hose goes to the IP and the other goes to the waste gate.

99 Montero SR
Mazda B2600i with 4D56T diesel swap http://www.4x4wire.com/forums/showflat.p...ID=#Post1240274