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Thread: losing fuel pressure ?

  1. #31
    Join Date
    Feb 2007
    Location
    Fort Worth
    Posts
    9,578
    I just don't see how you could be running that thing "like a banshee" and then it just leaning out all of a sudden. I CAN see that the clogged-ass filter had something to do with it, but like you said, it was probably running REALLY rich from the last tune. I would assume that the PCM is trying to "learn" this new inlfux of fuel and is voluntarily cutting it back lean. I would try and email Allen your log tables and see if he can recommend something for ya... Then he can tell you how to log everything in with your HPT...

    2000 ECSB 6.0L
    TORQUER V2 CAM ● COMP 918's ● 7.4 HARDENED PUSHRODS ● K&N SERIES 77 CAI ● 80mm BBK ●PACESETTER LT HEADERS AND 3'' ORY ● SUPER 40 FLOW ● 3000 STALL ● 4.10s ● BUILT 80e ● VORTEC PERFORMANCE TUNE ● MSD 8.5mm PLUG WIRES● ELEC. CUTOUT ● UD & ALT PULLEYS ● FLEX-A-LITE E-FANS ● 22" CENTERLINE STINGRAY III's ● LUND FIBERGLASS TONNEAU ● 2" LEVELING SHACKLES ● 12K HID LOWS & FOGS ● LEDs ● DEBADGED ● WHITE-FACED ESCALADE GAUGES ● KICKER 450.1 ● 2-CVR 10's ● DS60's ● K693's

  2. #32
    Join Date
    Jun 2007
    Location
    saratoga springs ,new york {upstate ,adirondacks }
    Posts
    1,878
    Quote Originally Posted by txarkitekt View Post
    I just don't see how you could be running that thing "like a banshee" and then it just leaning out all of a sudden. I CAN see that the clogged-ass filter had something to do with it, but like you said, it was probably running REALLY rich from the last tune. I would assume that the PCM is trying to "learn" this new inlfux of fuel and is voluntarily cutting it back lean. I would try and email Allen your log tables and see if he can recommend something for ya... Then he can tell you how to log everything in with your HPT...
    it has been running just fine and performing fine till this last week it had all kinds of power ,no skipping no nothing i thought it was just my w/b was screwing up again,because i didnt have any performance issues.that i know of,it felt the same as usual.then within a week it started popping and skipping.idk.im really getting discusted.i did send allen a log and he says he dont know what to tell me because its not in the pcm,its mechanical if it didnt help when i loaded my recent scan,the other day.today i hooked up my boost vac ref on my regulator for the hell of it and it did go rich,but its not running much better still skippin,but popping is gone especially when i lug it down ,it runs alittle better in tow /haul.cause it doesnt lug down as much.idk.im discusted.
    mods:2004 sierra ext sb,20s ,big brake kit w,hawk pads,air bagged,2006 6.0 lq4 swap,vortec supercharged10psi, air to water intercooled w/ dual electric fans on it ,snow meth injection kit,60lbers, e-fans ,big radiator swap ,cam 218 /222 548/550 comp .hardened prs .1.85 comp roller rockers ,guideplates ,crane double springs,trans 4l65e built .pacesetter l/ts true duals w/x pipe and magnaflows,14 bolt rearend swap ,3.73s,aroemotive fuel pump system w/elec.fuel controller and bypass regulator a/n fittings, taylor 10.5s interceptor gauge,aem w/b a/f ,autometer boost/vac NELSON 93 OCTANE TUNED .

  3. #33
    Join Date
    Feb 2007
    Location
    Fort Worth
    Posts
    9,578
    Since you have HPT, go and pick up some reading material and see what you can find out about tuning it yourself. There are some pretty good books out there from what I have heard for LSX motors. You can even take classes for it. Try and get the fuel delivery issue solved and see how you can tune it yourself.

    2000 ECSB 6.0L
    TORQUER V2 CAM ● COMP 918's ● 7.4 HARDENED PUSHRODS ● K&N SERIES 77 CAI ● 80mm BBK ●PACESETTER LT HEADERS AND 3'' ORY ● SUPER 40 FLOW ● 3000 STALL ● 4.10s ● BUILT 80e ● VORTEC PERFORMANCE TUNE ● MSD 8.5mm PLUG WIRES● ELEC. CUTOUT ● UD & ALT PULLEYS ● FLEX-A-LITE E-FANS ● 22" CENTERLINE STINGRAY III's ● LUND FIBERGLASS TONNEAU ● 2" LEVELING SHACKLES ● 12K HID LOWS & FOGS ● LEDs ● DEBADGED ● WHITE-FACED ESCALADE GAUGES ● KICKER 450.1 ● 2-CVR 10's ● DS60's ● K693's

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