I was doing some sprinted runs, never WOT. But held boost @ 30 psi 5 times? ASD light lit up. Car was normal the rest of the night until I turned off the car. Next day started it up with it weak.

All AMS O2 parts
Hallman MBC
Down pipe
ETS exhaust
Some AM Injectors



Before:
Held boost @ 30 psi max
Idle 14.7 - 15.0
AFR shoots up to 15.0-16.0 on gas
Turbo whirls normally
Strong pull throughout
Crappy MPG

Now:
Holds boost @ 15 psi max slowly loses psi
Idle 14.7 - 15.5
AFR drops to 11.0 - 13.0 on gas
No Turbo whirl, I can hear BoV and vacuum still
Strong low end pull, weak high end pull
Amazing MPG

Help!

 

Boost leak?

 

30 psi but not WOT?how much pounds you pushing at WOT? Your X is on limp mode I assume.

 

If there's a leak I can't find it, I should just soapy water every thing?

Not sure with the numbers, preivous owner didn't leave me the charts. Going to get a retune soon

 

Could ot be a faulty coupling?

 

limp mode!! good luck

 

Ended up getting cobb ap, but tuner didn't set psi limit..

 

problem solved??

 

For now yes, dropped mbc and picked up grim 3 speed. But I lost 20 whp.. went from 350 -> 330 whp. I definitely prefer having safe boost though. Now if I can fix my occasional erratic idle issue..

 

what fuel are u runing?

 

93 :/

 

no access to e85?

 

e85 is readily available here, I'm looking into getting an e85 tune and freely switching between the maps with cobb ap.

e85 $2.59/g
93 is $2.70/g - $3.00/g (shell)