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All, I know this topic has been done to death but I cant find any reference on the forum to my particular symptoms and associated problem with the lucas fuel pump on my TR6 1973 CR 1. Ignition on engine off the fuel pump runs perfectly albeit with the usual whine and will continue to run perfectly until switched off 2. Ignition on engine running – the pump runs perfectly for about a minute and then starts to hunt. The engine continues to run (tick over) with the pump continually hunting. Soon after shutting down the engine and restarting the pump it resumes its norm