engine cranking but dose not start some times

10

Asked by Sep 14, 2016 at 02:01 PM about the 2007 Audi A6 3.2 Quattro

Question type: Maintenance & Repair

engine dose not start up some times and i did not hear the noise of the fuel pump in this time.
but when i hear the noise of the fuel pump with ignition on the engine will start.
in another words ; when i hear the noise of fuel pump the engine start, but when did not hear the noise of the fuel pump the engine dose not start.

5 Answers

840

I would test for power and ground at pump when it will not start along with fuel pressure. If you have no pressure and have power and ground. I would say that you need a fuel pump

1 out of 1 people think this is helpful.
19,755

also change the fuel filter...

10

when that is happen and ignition switch is off and on again i check the fuel pump fuse and zero volt is there.

840

If you can get a friend. Have him crank the engine over while you are testing for power. When you turn the key to run without cranking the fuel pump with only get power for a couple of seconds

10

No power at the fuel pump when i turn the key to run without cranking. when i hear the noise of fuel pump (power is there)and the engine will start, but when i did not hear the noise of the fuel pump (power is not there) the engine dose not start.

1 out of 1 people think this is helpful.

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