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Dave, there is a safety switch on the back side of the sensor plate housing that turns the fuel pump on and off. If the sensor plate is not deflected from rest position by airflow, the fuel pump will not run. This is to prevent spewing fuel all over in an accident where the engine might have stalled. As long as the sensor plate is raised, the fuel pump continues to run, there is no on\off while running. HTH,
ianc
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BMW 135i. Nice. Fast. But no 911...
"I will tell you there is a big difference between driving money and driving blood, sweat and tears." - PorscheGuy79
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