I recently noticed a hissing sound coming from around my injectors. I Replaced all of my fuel injectors and i am still hearing the sound. So i went ahead and replaced my Fuel Pressure Regulator. I tried starting my car up and now its idiling really bad drops down to almost stalling and then revs itself back up. Ive been under my hood for awhile and cant seem to track it down. Maybe a small crack/whole in a fuel line? but i dont see spraying fuel but i can smell it. Any help would be apreciated.