Is it turbo??
I got a walbro for my car and installed it. went smoothly. i took the car for a drive and made 3 pulls in about a 5 mile period. everything was fine to that point. then coming home just cruising I noticed that my afr was around 12 when its suppose to be at 14.7. got to a gas station and the car almost died because it kept getting too lean. i would have to give it gas to keep the car running. this walbro is the first thing i have done to my fuel system.. i have heard they are loud and make a whining sound when on. mine is super quiet with no sound. could it be something else??