What is acceptable fuel pressure post-filter?

[RobG]

I got my SPA fuel pressure guage hooked up today, and went for a quick test-run.

The Peak hold on the guage showed 13 psi, with an average of 10-11 at idle. At WOT I observed 5 psi. Is this okay? Truck has 4800 miles on it and stil has the filter it came with when I bought it.

BTW, for anybody installing one of these off of the shrader valve on the back of the fuel filter, do yourself a favor and buy a right-angle piece. Mine is straight, and interferes some with the dipstick, plus it's so close to the firewall I can't get a screwdriver back there to tighten the screw that holds the wiring harness to the sender.

Rob

 

[Sean Flanagan]

I recently brought a pressure tester to our Rocky Mountain TDR gathering and tested a half dozen trucks or so. Your readings are as good as or better than most of them. Most trucks were 10-11 at idle and 5-6 at full throttle. I havn't found anyone to tell me what "in spec" really is but yours appears normal normal.

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98. 5 2500 QC LB 4x4 5spd, white. BFG 285x75x16
Cummins 24v w/ TST PowerMAX w/EGT and Boost gauges on A-Pillar. VanAaken CPC. K&N In the factory air box. Stock Injectors, Stock Exhaust (Geno's Muffler Eliminator). Re-routed breather stink tube, 2WD-low kit, SnugTop, JJ Stainless Running boards, Tow Hooks, Bushwacker Street Flares, and a Cup Smoothie.
83,000 miles (1/10/01)