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**mongocanfly** · 11-10-2017, 01:28 AM

when the key is first switched to on with the engine not running the pump should run a few seconds until pressure is built up....then it shuts off until the pressure drops again..(usually from cranking)....then it comes back on when the engine is running and the pump head pressure drops...if the engine is running the pump will most likely run constantly. ..

11-10-2017, 01:28 AM	#2
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,606	Re: Fuel Pump Running when the key is first switched to on with the engine not running the pump should run a few seconds until pressure is built up....then it shuts off until the pressure drops again..(usually from cranking)....then it comes back on when the engine is running and the pump head pressure drops...if the engine is running the pump will most likely run constantly. ..