Hi, I'm new to this forum and eager to learn a little more about mustangs. I recently bought a 95 mustang V6 and I'm facing some problems. Every time I step on the accelerator there's a little noise, kind of like a hissing noise. It only happens when I step on the accelerator, when I let go the noise goes away completely. The car seems awfully slow, and if I step on the gas it takes forever to accelerate. I just had a fuel pump put in since the car stalled on me the other day and would not start again, this problem seems to be fixed now. By the way it has automatic transmission. I was wondering if anybody can give me some clues on what this noise could be and also the lack of power?