I just got my STi EcuTeked along with an APS 3" Turboback install and a 255 walbro fuel pump. In colder weather for the last couple of days when accelerating hard in 5th or 6th gear the car's boost gets interrupted and it feels like i'm momentarily hitting a wall...abrupt hesitation like i've hit the rev limiter except i still have a way to go before redline. Right after this happens the CEL light comes on along with the Cruise light blinking...it goes away after i shut the engine off for awhile and start it back up. I am thinking it is fuel cut and this situation can be resolved by pulling the timing but when i pulled into the garage tonite i noticed some black spots directly under where the engine bay is supposed to be...it looks like oil but smells like fuel...any guesses to what the cause of this leak is? Am i running lean? Leaky gasket? Can fuel cut cause a leak somewhere in the engine bay or is this just an improper install of the turboback or fuel pump?

thanks, Ghost

 

sounds like your hitting boost cut, but you have an Ecutek tune

what PSI are you hitting when it happens?