Erratic Rail Pressure, Lost Power & MPG
I am having erratic rail pressure and rail pressure will not go over 19K. When accelerating the rail pressure would climb up with the RPM as normal till it come to a point of diminishing return and the more you step on the skinny pedal the rail pressure will drop about 6K PSI and will stay there till the RPM picks up and the rail pressure recovers or if you back off on the skinny pedal just a hair and the rail pressure will immediately climb till it maxes out at 19K.
When on cruise control on the highway @ 60 MPH the rail pressure will be at about 18K and as soon as you encounter a small hill or incline when the ECM demands more fuel and rail pressure to counter the load, instead of increasing the rail pressure, it drops to about 12K and does not build power as it should.
At times when I’m at a stop light the rail pressure bounces from 7K to less than 3K and the RPM bounces around in concert with the rail pressure and the truck feels like it will stall. One time I was on the highway cruising @ 60 MPH I noticed the truck surging, rail pressure and RPM bouncing. It only did this once. ECL came on and I checked the code with the SMARTY and it says "P0193 fuel pressure sensor voltage too high". Cleared it and never came back.
I’ve also lost power along with about 9% in fuel mileage. The truck feels sluggish and has lost the getup and go. It feels like a stock truck without all my mods. I’m suspecting possibly a bad FCA. I welcome any suggestions on what could be wrong? Sorry for the long post.
2006 3500 Mega Cab, 4X4, Laramie, G56, Nav, EVS, U-Connect, Smarty, CFM+, Grid Heater MIA, Banks Cooler, S&B CAI, Fluidampr, DiPricol, Dual CAT 2 micron, Mag-Hytec, Line-X, Amsoil bypass & pre-charger, ATP Acoustic Blankets, Ravelco.
Last edited by PRO-NRA; 04-14-2010 at 11:39 AM.