ok so my 90 foxbody has a hissing noise i can’t really pin point it out becuz it’s only doing it when i press on the gas pedal once i let go n the car is coasting it goes away i know it’s not coming from inside the interior n if the car juz sitting still i rev up the engine n notting no noise like i said only when i press on the gas pedal it makes that noise... any suggestions?