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Fuel pump extremely loud

Speedwagon
in Old Gen.: 80's GL/DL/XT/Loyales...

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When I did the SPFI conversion on the Brat, I took the pump from the donor car. Everything was fine, though it did make some noise. One day it quit making noise(and just quit), so I put in an F150 pump. After a day of use, the pump got very loud. After a few days of this, I figured the pump was going bad, so I exchanged it for another pump. Same thing, after a day or so of use, the pump is making a horribly loud noise.

 

So what's the deal here? There has to be something with my car that is making this happen. I do notice that the noise will change in pitch, in time with the turn signals if one is on. Does the noise come back to some kind of electrical problem somewhere?

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