On the 24V Dodge Cummins models (98.5+ to common-rail whenever that was) consider it mandatory to install a fuel pressure gauge or idiot light. Treat it like the engine oil pressure gauge.
Of the four I know the owners of, _all_ of them have eaten the injection pump (to the tune of $2000-$3000) when either the lift pump failed or the fuel filter clogged due to a load of bad fuel. Otherwise, they're fine engines. -- Jim
