so I tried to put pressure on the fuel tanks to bleed the air out yesterday, then found the batteries dead. so im gonna go get some new ones today. how do I check the lift pump and where is it?
robert ron
kalispell mt
83 6.2

If it's a mechanical lift pump, it's located on the passenger side of the block in front. As to checking, take both wires off the injector pump(pink and green) and take the output line off of it and place hose in bucket that you know the capacity of( small one prefferably). Time it when you crank the motor and you should get no less than 20 gallons per minute when you do the calculations.

isn't that 20 gallons per hour? per minute is one hellofa big pump

My bad typo, but that would be one bad ass pump!