A8 D2 3.7 Q sport fuel wiring diagrams - please help

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06-22-2022, 05:48 AM

HumveeUK

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A8 D2 3.7 Q sport fuel wiring diagrams - please help

Hi,
I have an intermittent problem with my car not fueling. Mechanic has advised that he is sometimes getting no signal and sometimes getting a varying voltage on the feed to the fuel pump relay but he cannot find any wiring diagrams.....
can anyone please help...?

Thanks in advance
Dom

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06-22-2022, 08:52 AM

UncleSam

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I replied to you in my old thread with wiring diagram for a 1995 4.2 fuel pump. Might be the same, might not.

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06-23-2022, 05:25 AM

jfrahm

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That sounds pretty unusual, is the fuel pump old enough to be suspect? They often stick a few times before quitting forever. I've heard of the relay going bad also but maybe only once in 20 years.
If the pump has 200K Kms, 120K miles on it, just replace it IMO.