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1998 BMW 740i Question: shaking,losing accelarATION

 

Question

Visitor, Philadelphia, PA, June 17, 2011, 01:01

HOW U KNOW WHEN FUEL PUMP IS GOING BAD?

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  • Answer #1

    overbys from Overbys Inc, June 17, 2011, 06:08
     Master

    you prove it by performing a fuel pressure test

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  • Answer #2

    patrick mannion from Greg Solow's Engine Room, June 17, 2011, 07:31
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     Master

    You can confirm a fuel pump is good or bad by checking fuel pump pressure, fuel pump delivery volume and looking at its scope pattern on an oscilloscope. Also verify correct voltage is present at the pump with no voltage drop.

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