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Troubleshooting a dead fuel pump S70 1998

posted by  jwalker on  Mon Oct 9 08:00 CST 2017
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last visit: Fri Jun 6 08:39 CST 2014
[RELATED]

I really don't think it is the pump. I believe it is most likely an electrical issue. Reason I say this is your wife was able to restart the car numerous times after it stopped running. Normally if the main pump dies the car will stop running and not restart. It should also sputter and cough as the fuel supply is cut-off. That is what happened when the fuel pump died in my VW years ago.

Personally, I would consider replacing the relays (cheap) and/or testing the electrical flow at the pump first before replacing the pump. Those Bosch main pumps are robust but also very expensive...:)

Also (if my memory serves me correctly), if the electrical flow at the camshaft sensor (also cheap) is skittish the car can stop running randomly. Much like when the crankshaft position sensor dies in the RWD cars.






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