I recently replaced my stock intercooler with an ebay intercooler and before any of that I have regular performance bolt ons including turbo back exhaust, k&n filter, aem boost controller, act street clutch & flywheel, and walhbro 255lph fuel pump which it ran fine with. Now with the intercooler on the car at stock boost setting @ 20psi the car back fires and is pretty scary hitting close to or at redline. I'm scared to to go above 5k rpms because of that reason. I don't have a tune on the car yet but I'm planning on tuning it after I get a set of kelford 272's since I would have to re-tune the car again once I get the cams. Pls help since this problem is driving me crazy. Thanks BTW i have a 06 MR

 

You already diagnosed your problem.

 

Keep it up and you won't need a tune,because the motor will be in pieces.Stay out of boost until you tune the car.

 

boom goes the dynomite!!...

yea just stay out of boost like was stated... all those mods are altering your mixture, and its not worth the risk....feel free to learn the hard way, i had a motor go on me..its no bag of skittles

 

Thanks for the heads up guys. I didnt think with those mods it would affect the mixture as drastic as it does, apparantly I was wrong. I'm gonna go ahead and shell out the money for the cams and tune now so my motor doesnt become a storage container for steel.