Fuel Pressure
for Cummins Diesel engine(s)
You can use any Auto Meter Full Sweep Electric Fuel Pressure gauge to monitor lift pump (not injector) pressure, though we recommend the 30psi units as a best fit for this application. However, you must also install a #3279 pressure snubber fitting and #3227 stainless hose kit to protect the sending unit as '98 to '02 (and some '03) Dodge Diesels produce a very sharp, very high pressure spike in excess of over 300psi between the lift pump and injector pump. This spike can destroy the sending units of these gauges without the snubber to protect them. These spikes are not visible on the gauge because they often occur at startup during the calibration phase and are too quick and sharp to register. Run the stainless hose from the pressure source, then thread in the snubber using one of the supplied fittings that comes with the kit, then the sender threads into the snubber. Complete installation as per the instructions included with the gauge.
http://www.autometer.com/tech_installation.aspx