Rubber Fuel Lined Replaced, 1988 Jeep XJ 4.0 –
After replacing both rubber fuel lines coming out of the tank, I thought they should be tie wrapped up and out of the way. The bonus ended up being that the noise from the fuel pump went way down. I could feel the pulsing from the pump in the rubber line, and it was significant. So the old ones must have been lightly resting against the sheet metal back there and resonating whenever the pump was running. I’d say at least a 50% reduction in fuel pump noise.