Question on Fuel pressure?

[CumminsCrazed]

Hey, when i first installed my FASS in June 07, i saw an idle reading of about 14PSI and no lower than maybe 12.5 or 13 on WOT. Ive now put about 10k miles on my FASS system and when i throttle the truck now, the needle jumps down to about 10 or 11 PSI. Also, when i first installed FASS the needle would be a smooth transition from idle to WOT and now its quick and jumpy. I have the Autometer electronic fuel pressure gauge as well as a snubber valve installed (autometer said they will not warrant an elec. sending unit without one installed). So my question is now, what is causing the drop in FP off idle and the quicker jumpier needle drops. Also, at idle and on the throttle now the needle kinda jumps around within about a 1 PSI range and is not steady. Any insight to this would be awesome. Is it time to change filters and this happens when filters get dirty?

Thanks

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Silver 2001.5 Ram 2500 Cummins H.O. 6 spd.
Silencer ring MIA, Muffler/Res. MIA, FASS 150/95 GPH, Boost Elbow, Edge Comp, AutoMeter Boost Pyro and Fuel Pressure gauges, Amsoil Nanofiber 4510 Air intake filter, B&M Racing T handle shift knob, Kenwood speakers front and rear

[Jakey's'01H.O.]

if you havent changed filters yet, id say thats what it is

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'01 ETH/SO VP. FOR SALE.
'04 silv quad SB AirDog. Arson 2. loaded. HOLLAND COURT DIESEL PERFORMANCE. WICKEDDIESEL. DIESELNUT COALTRAIN IS THE SH$T

[CumminsCrazed]

well, how often are you supposed to change filters

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Silver 2001.5 Ram 2500 Cummins H.O. 6 spd.
Silencer ring MIA, Muffler/Res. MIA, FASS 150/95 GPH, Boost Elbow, Edge Comp, AutoMeter Boost Pyro and Fuel Pressure gauges, Amsoil Nanofiber 4510 Air intake filter, B&M Racing T handle shift knob, Kenwood speakers front and rear

[CumminsCrazed]

anyone????

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Silver 2001.5 Ram 2500 Cummins H.O. 6 spd.
Silencer ring MIA, Muffler/Res. MIA, FASS 150/95 GPH, Boost Elbow, Edge Comp, AutoMeter Boost Pyro and Fuel Pressure gauges, Amsoil Nanofiber 4510 Air intake filter, B&M Racing T handle shift knob, Kenwood speakers front and rear

[tader]

It seems most people replace them anywhere from 5k -10k. I do mine every 10.

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BIG Toy: 2002 2500 SLT QC SB 4X4 FBD 5" Strait Pipe Exhaust, BHAF, Edge Juice w/ Attitude, FASS 150, Leveling kit, TOYO 315's

Little Toy: 1996 BMW Z3 1.9 5spd - 12000k HIDS, Angel Eyes and More Mods to come...

[Jakey's'01H.O.]

or whenever you have a pressure drop, like youre having

__________________
'01 ETH/SO VP. FOR SALE.
'04 silv quad SB AirDog. Arson 2. loaded. HOLLAND COURT DIESEL PERFORMANCE. WICKEDDIESEL. DIESELNUT COALTRAIN IS THE SH$T

[CumminsCrazed]

but why would i get a pressure drop from filter.....and i thought FASS filters could go like 20k miles before having to be replaced.....

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Silver 2001.5 Ram 2500 Cummins H.O. 6 spd.
Silencer ring MIA, Muffler/Res. MIA, FASS 150/95 GPH, Boost Elbow, Edge Comp, AutoMeter Boost Pyro and Fuel Pressure gauges, Amsoil Nanofiber 4510 Air intake filter, B&M Racing T handle shift knob, Kenwood speakers front and rear

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Last edited by CumminsCrazed : 11-26-2007 at 04:55 PM.

[Jakey's'01H.O.]

the filter would plug, and thatd result in lower pressure. fass filters are fleetguard filters, and like any filter, it will clog.

__________________
'01 ETH/SO VP. FOR SALE.
'04 silv quad SB AirDog. Arson 2. loaded. HOLLAND COURT DIESEL PERFORMANCE. WICKEDDIESEL. DIESELNUT COALTRAIN IS THE SH$T

[CumminsCrazed]

yeah i understand that...but i was just under the impression thats itd go longer than like 6 to 10k miles

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Silver 2001.5 Ram 2500 Cummins H.O. 6 spd.
Silencer ring MIA, Muffler/Res. MIA, FASS 150/95 GPH, Boost Elbow, Edge Comp, AutoMeter Boost Pyro and Fuel Pressure gauges, Amsoil Nanofiber 4510 Air intake filter, B&M Racing T handle shift knob, Kenwood speakers front and rear

[jefff929]

Originally Posted by CumminsCrazed

yeah i understand that...but i was just under the impression thats itd go longer than like 6 to 10k miles

that all kind of depends on how much crap is in your fuel. When I first started to use BioDiesel it cleaned my tank and lines leaving all the crud in the filters. I don't change them on an interval any more just wait till the needle dips

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sic-and-Fk'n tired of Trolls, CF included.

Good luck all

[CumminsCrazed]

hmmm, well i use the best fuel in this area (proven by fuel truck driver), and i run 2 cycle and amsoil diesel concentrate.....unless the 2 cycle is clogging it up

__________________
Silver 2001.5 Ram 2500 Cummins H.O. 6 spd.
Silencer ring MIA, Muffler/Res. MIA, FASS 150/95 GPH, Boost Elbow, Edge Comp, AutoMeter Boost Pyro and Fuel Pressure gauges, Amsoil Nanofiber 4510 Air intake filter, B&M Racing T handle shift knob, Kenwood speakers front and rear

[jefff929]

Originally Posted by CumminsCrazed

hmmm, well i use the best fuel in this area (proven by fuel truck driver), and i run 2 cycle and amsoil diesel concentrate.....unless the 2 cycle is clogging it up

IDK but I don't think so.

When I'm not running BioD I run #2 with 2 stroke myself. So far that has not been a problem

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sic-and-Fk'n tired of Trolls, CF included.

Good luck all