Chevrolet: 2002 Camaro Z28 rough idle, camaro z28, maf sensor

Question
The fuel filter was changed and the injectors were cleaned at the dealer. The car is not giving any codes. the dealer says there is no vaccum leak and fuel pressure is correct at 55 psi. The drive home seemed good on gas but today it is back to using too much again.

Answer
Swap in a friend's MAF sensor and see if that changes anything. You didn't remove the MAF screen or anything did you?

Let me know if swapping the MAF helps.

Its either the MAF, vacuum leak, exhaust leaks before the O2 sensors, or O2 sensors. Nothing else.