Hi guys. I am noticing some hesitation in my 02 WRX (4500 miles). When coming out of a dead stop I press the gas pedal and I can feel some hesitation for a split second, then the revs start coming up and the car moves. It's easier to notice when I am manuevering into a parking space or uphill. It can also be noticed even if you are outside and someone else is parking the car. I have no idea what it could be. Just in case i have the following mods installed:

UTEC
Perrin uppipe
catless downpipe
GReeddy evo catback
drop in air finter
grounding mod

Thanks in advance
Astacun

 

Anyone?