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Performance Testing for a weak 944 Fuel Pump


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Mention this in case of use to anyone,and as I would not normally do this. Read in Classics magazine ,chap with 944 suspected weak fuel pump,engine lacking power.

Owner connected fuel pressure gauge,did the normal pressure and leak tests.Results 2.5 bar pressure and leak down within spec. Then blocked the fuel line, cranked engine over.as the pressure did not rise knew that the fuel pump was duff.Performed same test new pump, results 5.0 bar.

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Yes, blocked return to confirm if the pump was able to pressure above 2.5 bar.

On 3/18/2019 at 3:07 PM, sopor said:

When you say blocked the fuel line I'm guessing you mean the return line?

 

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