i dunno if this is normal and im being paranoid about my car but i was driving home from work tonight and as i stepped on the gas pedal i could hear a pssshhh noise but it would go away as soon as it kicked in the acceleration it was cold out tonight so that maybe why but ive never heard it before when i got on the gas so i dunno im just wondering if anyone knows if its normal or ever heard the same thing before haha

 

Was the car cold? It was probably the air pump

 

Agreed ... probably the air pump. It cycles on and off during the first few minutes of warm-up, then you don't hear it anymore.