my mazda3 06 is getting weak and waste a lot of gas.

well... when i turned on the car, it shakes and a makes a roar noise, I think it has to do
with the body throttler ? I already cleaned it up with a body throttler cleaner, the noise
went away for a few second then it came back :( it is always there, specially when i step
on the gas or when i turn on the ac, it wasting my gas than usual and its very weak!! the
rpm is normal doesnt go any lower or higher and the spark plugs are new, and there is no
check engine light
please helped me!