Is there a way to check the fuel pressure manually at the pump. My fuel pressure used to idle at 17 and has now gone down to 16 at idle. Can the pressure be turned up? I can also drop it to 12psi at heavy throttle, where before it wouldnt go below 14psi.
Thanks

 

Have you replaced your filter? Sounds like your guage is telling you something. I would not worry about 1 PSI.

 

Yes both filters are new.

 

Depending on the outside temperature I see about a 1psi variation.

I just swapped gauge styles yesterday though and I used to see 15psi on my old DiPricol, but now I only see 12psi on the new SW. It may be because I lost a little juice between the gauge and the isolator during the swap and didn't replace it, but even at 12psi I'm not worried.