Reply to "priming the fuel system"

George PAdmin.

If you're using the OEM fuel pump suction line (which is too small in diameter by the way) it has a little nylon sock on the end that is known for becoming completely plugged. The usual remedy is to blow air backwards through the line, which blows the brittle nylon sock completely off the end of the tube and thereby resolves the problem; but it makes a fuel pump suction filter mandatory to replace the pump inlet filtering originally provided by the nylon sock. Fuel pump suction filters are usually recommended by all high performance pump manufacturers, with filtration in the 100 micron range.

If the level of fuel in the tank is very low, and the fuel pump inlet line is empty, it may be too much lift for the pump, or the pump is operating vapor locked. Raising the level of the fuel in the tank, or pre-filling the suction line may resolve the problem. Slightly pressurizing the fuel tank (blowing in the tank vent) may be another way to get the fuel flowing.

-G

5/27/1311:42 PM

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