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Loud buzz coming from main fuel pump 200

posted by  dthohler on  Sun Dec 21 13:56 CST 2003
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last visit: Fri Sep 19 02:06 CST 2014
[RELATED]

Hi, my 85 240 turbo main pump makes a loud buzz when the car is started. it does it sometimes and not others. i can usually turn it off when it does it, and it sometimes stops.

A few months ago it did this and a friend/volvo mechanic said that it is likely the pre pump. when i had the pre pump assembly out of the tank, i noticed that i could unplug the wire and the main pump would make the buzz sound, therefore i knew it was most likely the pre pump's doing.

i replaced the pre pump and now it is occasionally doing the wierd buzz sound, not always.

is there a relay that cause this or what?


thanx
Devin





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