My Chilton book suggest my fuel pressure should run 30-40 psi. I put a gauge on and it runs at 29. It raises to 35 when accelerating the drops to 26 for a few seconds then returns to to 29.

The reason I ask is because I am trying to determine why my truck is running a little rich.

Oh and I checked my regulator and it is working properly. I also changed the fuel filter and the pressure is unchanged.