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I cleaned my 2009 Audi A4 Quattro 2.0 engine bay when I replaced my high pressure fuel pump and now it won't start

I took off to go to my girls house and turned off my car, but right after i tried to turn it back on it wouldn't crank or anything. The Audi dealership told me I needed to change my high pressure fuel pump so I thought that might have been the reason but now after replacing it, I'm still jn the same predicament. I changed the crankshaft sensor and now I'm stuck. It cranks but seems as if it's not getting the spark. Im at 172k miles. 2nd owner.

Posted by Ruben J Martinez on

  • Anonymous Dec 20, 2021

    First off we need to know what make , model an year vehicle you have . Not all high pressure fuel pumps need to be paired to the ECU - what ever the heck that means .

  • Ruben J Martinez
    Ruben J Martinez Dec 21, 2021

    2009 audi a4 quattro b8 2.0



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Did you pair the pump to your ecu I wonder, Most newer vehicles record the serial numbers of specific parts to the engine computer. When a specific device is changed, the serial number has to be recorded within the ECU software.
A Snap-On OBD controller can do that.

Posted on Dec 20, 2021

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Hi honda expert here.
my advice on this " after fitting new fuel pump , test it after installing " test the pump after installing see if the pump is working and make sure to do the connection proply

Posted on Dec 20, 2021

Testimonial: "Ok I'll try that"

  • Tiaan Dec 20, 2021

    Okay sharp hope you come right.



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