Help! Hitting 25 psi with no ecu mod

:
Mazdaspeed 6 GT
Its getting hot here and humid. Well yesterday I went to give it partial throttle in 4th around 3600 rpm and my DEFI gauge Spiked to 25 psi and the car definitely has some kind of cut or Detonation.

My mods are these as far as performance.

Corksport SRI
Corksport Inlet
Corksport cold air box
Turbo XS test pipe
Corksport CBE
HKS SQV II with ATP flange VTA


I have already checked the Vaccum line to the Boost control solenoid. I have no check engine light so could it be a faulty line, bov, wastegate stuck?
I noticed this I get on it and it will Boost crazy and cause my car to hesitate and Im pretty sure detonate then it takes off
 
Last edited:
Obviously can't say for sure with this tiny bit of info, but I would guess the BCS is stuck closed (no boost bleed) or the WGA is stuck closed...

It "could" be your MAF is real dirty as well, but you should have other symptons.
 
Obviously can't say for sure with this tiny bit of info, but I would guess the BCS is stuck closed (no boost bleed) or the WGA is stuck closed...

It "could" be your MAF is real dirty as well, but you should have other symptons.

Yea I thought it was hesitation but I never really pay attention to my boost gauge and my friend says s*** your hitting like 25 psi and I noticed im sure it was detonation.

I already have a spare boost control solenoid in the garage. And I will check the waste gate actuator as well. Would a vacuum leak after the Maf cause this at all?

Also why would it not throw a cell?
 

New Threads and Articles

Back