Robert, Carefully tighten the top cover on the pump....to the proper torque, and the pump will stop sucking air instead of fuel..... I suspect that the top is not tightened properly because everyone is afraid of stripping the bolt, or rupturing the pump...so they don't use a torque wrench ( and new gasket), when complying with the annual AD to clean the pump and strainer...
I have seen several coups (including yours) that have failed pumps for this reason..several bought new pumps...! Quite an expensive solution to an improper torqued bolt problem...or bad gasket... Have your mechanic check the service bulletin and AD for the proper torque, and I expect this will solve the problem of an intermittant pump pronlem.. Fly Safe - Have Fun Regards, Harry Francis 93530 Blacksburg, VA.
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