So i have a 99 grand prix gtp coupe. Black, sharp car, i love everything about it but more and more problems keep popping up! So i Drive my car to winchestor to get some food and as the guy infront of me orders the whole menu i get it sit behind him and wait. So as i am sitting there i hear this sound coming out the rear of my car. It sounds like air. (like if you put a open end on a compresser hose and it blows air, it sounds like that with a little less pressure behind it.) What i cant figure out is what is it? The only thing back there is fuel, brake lines, and the fuel pump? Right? If the lines had problems i would fine out fast. Ruled them out i think. Is it the fuel pump?
Next problem is when i am driving the car and get on it(around 4k rpms) the car will start to like studder like the fuel is momenteraly stopping. When i watch the rpm gadge when it happens they jump with the car so its something fuel right? Maybe?
Any help would me much appreciated. I am not a mechanic (no Where close) so these are just my guesses. Thanks for your answers and knowledge!