I have a 2010 evo x. I have the Q300 CB exhaust, AEM drop in cone filter and Tune.
The problem: when I'm driving in like a normal person, just when here the BOV go off. My ASC light came on and I'm in limp mode. No throttle response!
People are telling me the air/ fuel mixture are not right. I'm letting to much air in cause I didn't change intake pipes. So I need HELP!

 

what blow off/diverter valve are you using?

 

First, search and you will find the answer.

Second, improperly tuned.

 

I'm using synchronic bov

 

I'm gonna get it tuned again after I get my AMS AI.

 

This... hopefully someone competent will do your next tune

 

get a tune. i'd bet ma $ on airflow/tq exceeded limits :P

 

Thanx guys, if anymore info let me know...

 

It's 99.9% a tuning issue

See post #7

 

Did you add the BOV after you got tuned originally? Most aftermarket BOVs will cause you to boost higher. I suspect you are hitting 30psi and going into limp mode because of it.

 

Maybe a MAF sensor failure.

 

i disagree