I was able to "nurse" a few thousand miles out of a bad fuel pump by flushing it with kerosene (or diesel fuel). Remove the pump from the assembly. Place in a vice with inlet at the bottom - outlet at the top. Place a bucket under the inlet of the pump and pour diesel fuel or kerosene in the inlet. Use a power source ie: battery to connect to fuel pump - negative to positive, positive to negative. Do this several times until the pump flushes clean.

DO NOT USE GASOLINE!! ANY SPARK WILL CAUSE AN EXPLOSION/FIRE AND YOU WILL BE HURT!!

My pumps spat out all kinds of crud. The tollerances of these pumps are so close that any amount of sediment will eventually cause the pumps to "lock up".

Unless you are very sure of yourself and very cautious -PLEASE do not do this. If you are wary of the proceedure then, by all means, purchase a new or used fuel pump!!