I have a 0-100 psi fuel pressure guage. Had it in my truck for a couple months and now the guage is spiked at 100 psi. I checked it with a actual tester and the pressure is fine. I unplugged the guage wiring from the sender and the guage went down to 0. So im assuming the sending unit is...
Yes sorry. The gauge is a isspro ev2 on my pillar. I checked it with a tester and pressure is normal. So yes my gauge is messed up. Just random how two guages on two different trucks have the same problem.