I need your help. I have Aem fuel pressure gauge over year. Other day gauge read off. End up stay 100 psi. I replaced be fuel sensor sender it show 40 psi at idle. Full throttle drive 55 psi. Old one when it was work idle at 60. Full throttle something 80-90 psi I can't remember. The sensor connect to Aeromotive fuel pressur regulator.

My truck Injectors are 80lbs and fuel pump walbro 450. I can't figur out if my gauge read right or not. Give m any idea or know what cause. Don't know won't buy waste that not fix. Ya know. Many thanks.