Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
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What is the reason you feel there is air in the filter? Is the engine hard to start hot? or after it sets overnight?
Do you have to pump the primer to start?
Most air leaks that enter the fuel filter , are cause by the bleed screw, and the WIF ( water in fuel ) sensor seal at the bottom of the filter. ( no more than 1/2 turn from contact or it will deform the seal.
These engines are know for injector issues that cause a hard start that can act like air in the fuel, and priming the filter will get the engine to start.
So I'm just trying to get a good idea of the condition that is occurring, so I can best help you repair the condition.
after it sits for awhile it will start @ run for about 30 seconds @ die if i crank it long enough it will restart but i usually pump the primer @ it obviously starts much easier. if i park it nose down it will start @ not die. i have replaced the filter housing twice @replaced the fuel lines connected to it
Thank you for that information. Have you checked the fuel lines from the tank? I have seen air leaks develop at the hoses from the frame to pipe connections at the point the lines go up and over the transmission and also at the point the lines connect to the engine.
You can get a 1/2 " clear line and connect it to the inlet side of the filter to see if air is entering the system before the housing. Then it will be necessary to verify the lines from the tank to the engine.
I have seen a couple of sending unit hose leaks inside the tank. There is no pump in the tank, but there is a flexible plastic hose that can develop pin holes and cause air to be drawn in.