Question about Jeep Grand Cherokee

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Replaced manual fuel pump blew all fuel line out

Car ran good after sitting for years but had trouble starting every so often changed in line filter by carb and replaced manual fuel pump and blew air in all lines still no fuel could it be a pick up inside fuel tank ?

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Do you have more than 4 gallons of gas in the tank? Some models won't **** to prime with less than that in the tank. This is mostly an issue when there is air in the lines. There is usually a screen filter on the pick up, but blowing that out should have taken care of it at least for a few days. Another possibility is a pinhole leak in the line between the tank and the pump. That lets the pump **** air, which will not let it **** gas. There could be a larger in-line filter between the tank and the carb filter. Let us know if you find out what it is.

Posted on Feb 04, 2010

Testimonial: "I 'm certain there is more than 4 gallons but I will add gas. is ther any reason to pull out the pick up line in the tank? "

  • David Burke Feb 06, 2010

    Probably not. Can you put a rag around a air hose nozzle and blow into the gas tank with a compressor to see if the fuel will go all the way to the carb that way? If so disconnect the fuel line at the carb and try that. Be ready to catch the fuel if it flows. If it does not, have you checked for a pinhole leak in the line? What year is this and how many miles?

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