My car is N/A. I have the Autometer Phantom electronic fuel pressure gauge that cost $150. I am beginning to question the accuracy of this gauge. I have had it for 5 months now on my a-pillar and it reads about 30psi, and when i floor it, it goes up to 40psi. The problem is, when I drive for a long period of time, the gauge reads about 60psi and when i floor it, it stays at about 60psi. Is this accurate? I'm beginning to think the heat is throwing the gauge off. Anyone else have this problem? I have everything hooked up right, the only other thing I can think of is the black box that all the wires hook in to is in the driver's side kick panel, but not bolted down. Any ideas? It sure was an expensive little gauge!