My aem gauges read that my car doesnt boost past 12 psi. What could be wron and how can i turn up the boost. Im running stock 8 turbo on a 2005.

 

https://www.evolutionm.net/forums/ev...low-boost.html

Could also be the waste gate flapper, i would not just turn up the boost when you get this resolved until you are tuned for it. Do a search on here, should be quite a few threads on this issue.

Could also have a boost leak, worn out clutch if you are having an issue around 4-5000 rpms.

 

try to build the boost using 2 step.if its not building it means something wrong with waste gate.

 

check for boost leaks as well

 

Try the search feature

 

How many miles on the car and do you have a cat on the car? The only reason I ask was this guy I know had a issue with building boost on his evo, and slowly he noticed his car was feeling weaker to the point that it only made 6#. Turns out his cat was clogged, swapped out to a test pipe problem fixed. Not saying this is your problem but you never no. Then again it can be other things.

 

Is this new or has it always been doing this since you've owned the car? If you recently bought it I'd guess a boost controller was removed and there are no boost pills in the vac lines going to the BCS.

 

I would first start checking for boost leaks. Does the car feel down on power?

 

^ I think Raptord is right. Check your boost lines by your WGA & j pipe. This is a very common problem for new Evo 8/9 owners.

 

WOT at 5k the car sputter/losses power. Im reading it could be overboost but im only boosting 12psi how could that be? The car needs a severe tune, could that be it?

 

Sounds like the car needs to be tuned badly.

Rev limiter set to 5k??

Does the car have the stock air box??

 

First of all, stop going WOT if your car "needs a severe tune"

 

Dude, you're gonna blow it if you keep doing stuff like that.. If you don't want to take the time to figure it out, take it to a mechanic/ tuner ASAP, or learn the hard way.

 

If it needs a severe tune, why are you flooring it? Take it to a tuner and see what they say.

 

Where is Sparky?