Okay so I have read around for a while and can't seem to find out what exactly my gauges should be reading on a pretty stock mustang GT. Its a 2000 GT with just a few bolt ons and the stock pump. I installed an aeroforce interceptor scan gauge as well as a stewart warner fuel pressure gauge. At idle the interceptor reads 39psi and the stewart warner reads 29psi. When I get driving the stewart warner jumps to around 39psi when giving it some throttle. I've heard about how in vacuum it should read less and at boost it should read more but i have no idea what each gauge should be reading at different points. Will someone please help me out on this?