Super Duty & Heavy Duty1999 to current Ford F250, F350, F450 and F550 Super Duty with diesel V8 and gas V8 and V10 engines
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Any body changed a fuel pressure regulator on one of these? I'm having an issue with it running really lean, like laying down with no power lean.I put the pressure gauge on it and I'm running an even 30 pounds at the rail. Changed the filter in hopes, but no change.
Just changed the O2 sensors and they were both white.
i had the exact same thing...i had to replace the fuel pump...ended up having sugar in my tank...but, make sure u test the pressure while driving. mine had 30 at idle, but driving it only had like 15...strap the gauge to the wiper and watch it. probably a fuel pump problem...good luck
__________________ Chris -200K+ Club Member 2000 F250 CC 6 Spd 7.3 POWERSTOKE MODS:(Thanks Jim)BRIAN'S TUNES,AIH Delete,.50 Mod,Fog Lights,6637 aFe Filter,4" MBRP Turbo Back and Dual Stacks,GRP LED,ProComp 9000 Shocks,EBPV/Pedestal Delete,CCV Mod,Glowshift 3 in 1 & Fuel Press. Gauges,Foil Delete,IDM Mod,RR Frx,RR Hrx,In-Tank Mods,6.0 IC, RR boots and inserts,MidWest Short Shifter,910 Springs,Melling LPOP,Van Turbo,Joey's T500,ATS Housing*1999 Polaris 455 DIESEL
Guess I should have taken a test drive before posting. Changing the O2 sensors straightened the problem out. Go figure, I knew that they could go bad and not throw codes, but had never had one fail on me like this before.
Out of curiousity I ran it with the fuel pressure gauge hooked up, It stuck constant on thirty, I even tried pressing the pressure relief vavle on the side of the gauge and it didn't even stumble, pressure dropped to 20 and then bounced right back up to 30.
Now if I can trace down my itermittent miss I'll be set. I have the feeling that the plugs are original, judging from everthing else I've fixed so far.
You should get about 38-40 with the vacuum disconnected from the regulator.
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