The metering bar on my Volvo
2020 was stuck in the closed position after setting for 6 months without running. Fuel
addatives did not help as they could not enter pump. A local diesel
helped me remove the pump and I told him to send it out for repairs
. He put the pump in solvent overnight and the next day it was fine and we reinstalled. His claim is that this is a result of the diesel available today. Local truckers are adding ATF to their fuel
for lubrication. Has been trouble free since.