my 03 evo can't boost in 1st and 2nd gets only 10~12psi. but 3rd gear is fine with 22psi. any ideas whats wrong with this picture? the car has cams and basic mods. thanks in advance. MIKE

 

Possibly you might have a boost leak or the turbo is going bad,but it's most likely a boost leak.

 

what are you using for boost control?

 

forge mbc & bov.

 

i thought it was a leak too. had the problem with the stock fmic. so i decided to upgrade the fmic plus all the coupling with t-bolt clamps. checked all of my vacuum hoses including the mbc hoses and manifold. and how would i check if the turbo is bad?

 

Take the mass air pipe off that connected to the turbo and shaking the turbo bearing around if it has lot's of free play it's the turbo.Also make sure that the boost controller is set up properaly and installed right if it's hooked wrong you could have a problem like this.What is your boost level set up now?

 

just thinking you change the hoses that connect to m.b.c and the turbo housing there mightbea pinhole leak.

 

i'll check it out tomorrow. mbc is set at 22~23psi. but i'm still troubled. i get full boost in 3rd but not 1st and 2nd? if its a boost leak, wouldn't i be leaking in 3rd too?

 

Not usually don't forget as you go threw the gear's there's more load being used,put this way if you set your boost at 25 psi your not going to see it in first but when you go to second you'll see more boost then when you hit 3rd then it's at 25 psi just an example.Sound's to more there's a small boost leak some place check everything over again.