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Re: Low fuel rail pressure-04 2500HD Chevy 6.6
Posted to HD/Fleet Forum on 5/20/2009

Dale,

The procedure is the same, just more difficult to perform. Look up on Alldata for high pressure diagnostics & you will find a procedure for isolating the pump & both banks return flow rates first. This will then tell you where & if you have excessive r... Login to read more.