I have a 05 evo. I have the AEM electronic boost controller. And evo 9 FP green turbo and stock 550 injector, and running 91 gas. I have a problem with the boost recently. It is like when I raise it up around 21 or 22 psi, there was a boost cut so bad. And when I turn it to 20, that won't happen. When I did it, the weather was like 14 degree. I wonder is that max up my injectors or sth else?

 

you either need to raise your boost cut load % or gap the plugs tighter or get new plugs. its probably just the boost cut though if it has no tune on it.

 

Thx man. I ll order the plug asap and see what will be doing

 

no problem.