[cwmcobra]

To close the loop on this question, Jim, it appears you have right answer. Here's the response from Aeromotive to my tech question:

Chuck,

I’d bet dollars to doughnuts that you have a liquid filled gauge. This is a common problem, as these gauges seem to change their reading approx 3-5 psi from cold to hot, with the cold reading being the higher and correct pressure. To test, take a heat-gun or blow dryer and, with the fuel pump running and engine cold but idling, heat the gauge gently but rapidly. Let me know what you find.

Brett Clow
Aeromotive Tech Dept

You guessed it.......I have a liquid filled gauge. Can't figure out why I paid more for the liquid and have this type of problem. Ignorance is no excuse!

Guess it pays to ask the experts. Jim, I'll include you in that group now.

Thanks,

Chuck