Where does the vacuum come from during WOT conditions? Im not refering to a eureka either! Now I can understand that the pressure on the W/G canister could be less than the boost in the plenum, but not a vacuum.

 

Check the clips in the air scoop. If they are not in the scoop flys up and gets no air causing that problem.

 

Are refering to the air box / filter air scoop? If so, they're clamped correctly. Since the change of the solenoid, the boost is as stock, then it drops to 1.0 bar, then shoots back up to where it should be relative to the rpm.

This problem only occurs in the lower gears when there is a high cfm demand due to a high rate of rpm acceleration. On the freeway in 4th or 5th gear, everything seems fine.

 

I just checked the 2 black clips that hold the front lip of the inlet to the air box & they are in as should be.

However, I just noticed how the dealer did a hack job of rerouting the boost gauge line that they originally installed? Thousand oaks mitsu is not very good so far.

Outside of boost lines, BOV & boost solenoid, has anyone else had a boost related control item fail on them? Boost sensor for ecu? etc?