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fuel Pressure high

On a recent flight I got a high fuel pressure warning. At first I thought it was something due to the unusually cold weather we are having in Texas, but it sporadically keeps occurring regardless of temperature. On just the engine driven pump the pressure is jumping around anywhere from 26psi to 45psi. I have the warning set to go off at 42psi.

Any ideas on where I should start??

Richard
 
I figured it out. Apparently the nut on the fuel sender decided to jump ship at some point. I just put a new nut and lock washer on there. Now to go test!
 
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