What is the difference between a 30,000 PSI Fuel Rail Pressure Gauge and a 30/100 PSI Fuel Pressure Gauge?Updated an hour ago

The main difference is where the fuel pressure is measured and the pressure range the gauge is designed to display.

A 30,000 PSI Fuel Rail Pressure Gauge measures the extremely high fuel pressure directly from the common fuel rail on diesel applications. Monitoring rail pressure can help verify proper fuel system operation and identify potential issues that may affect the fuel pump, injectors, or engine performance.

GlowShift Fuel Rail Pressure Gauges are compatible with:

• 2003–2016 Dodge Ram 5.9L and 6.7L Cummins

• 2002–2016 Chevy/GMC 6.6L Duramax

A 30/100 PSI Fuel Pressure Gauge measures the lower-pressure fuel supply between the fuel pump and the fuel rail or injection pump. Monitoring this pressure can help diagnose fuel system problems and potential performance issues.

Important: On 2000–2018 Chevrolet Silverado and GMC Sierra 6.6L Duramax applications, a Fuel Pressure Gauge requires an aftermarket lift pump to obtain a fuel pressure reading.