Discussion Starter · #1 ·
So I installed my AirDog II-165 a few months ago and ever since I've had this "thump" sound that comes from the fuel tank. It's a single "thump" or "glug" that happens every 30-45 seconds after I turn the truck off for about 5 minutes (honestly haven't sat there and timed it). It's almost as if the fuel is slowly draining back into the tank and it's the sound of the air pocket replacing the fuel in the line. If I crack the fuel cap, there is no sucking sound of air rushing in or out of the tank. Other than this sound, the system is working fine and I haven't had any issues thus far. Any ideas or similar stories?