I verified my fuel pressure 3 summers ago when I was having trouble with a miss under load. Took my moroso 0-15 psi tire gauge that has been checked at the NHRA nationals many times(my crew would have it checked several times a year for free at the races) and layed it on my outside windshield under the windshield wiper and drove around with it. I had 7 pounds under load and 8-9 psi at idle. I can't get my picture to upload that shows the psi gauge as I am driving down the road because photo bucket has me locked out. I think I owe them money?

Turned out that I needed fresh spark plugs, I had like 10K miles on them. My manual choke is hard on them.

I am sure of the pressures that I speak of.