ok so i noticed my car lacking in power when it hits the usual wheel spinning shannanigan rev range of 4-6 grand, it doesnt do it when cold only when warm and if i unplug the maf then drive the power band comes back, my questions are- does the ecu put a nominal value in for the maf when unplugged, and it has no wire mesh in it could that be making a difference, i have tried cleaning it with brake cleaner to no avail, also a bit of topic but what is the little valve type thing with a plug connection on it do, which is in the oil breather from the rocker cover to the intake pipe? thanks in advan