i am new evo owner. my question is why is everytime i boost and then switch to nuetral comes to a stop the rpm drops below 1000rpm & sometime stall and you can see the gauge light dim. & in fifth/fourt gear when i boost more than 20+psi CEL turns on you hear a back fire. after scan fault code P0234 turbocharger overboost. i was told by sports import jay han that my car is boostin more than 25+psi and my stock wastegate is not holding and needed an updrage. i am no expert & i need help from anyone who is knowlegable to tell me what is the real deal =)

thanks

 

Some "import shop" told you to upgrade parts before correcting problems!? I would never take the car back there again.
Try this place insted;
http://www.roadraceengineering.com/RoadRaceContact.htm

 

thanks
do they charge $$ before or after they find out the problem?

 

RRE is a legit shop. I've never had them diagnose a problem for me, but I did have my timing belt done there. They gave me a quote, did the work, and didn't come back with BS; "Oh you need this, that, and the other." I'm guessing they will have to charge you for putting the car on the lift and for the time to go through the car, but will probably apply that to any further work they do. Give them a call or you can post your questions here too;
http://www.socalevo.net/index.php?op...=37&board=56.0
I have been getting my parts and fluids from them for over 10 years and just about every Evo and DSM that's rolling in Southern California has been there at one time or another. They know what they are doing.