external f/p advice needed
god ive missed my truck,lol.so todays ordeal was fuel pump decided not too work.after changing pump i discovered i wasnt getting power to it via fuel management unit .parts are all aeromotive.so long story short i bypassed my fmu and wired the pump directly too get home.this is the problem ,it doent likr too start now it takes like 10 times to get er going if im lucky.what difference do i have except beeing direct wired.the old setup the pumpp would kick on for 5 sec then go off till i started the truck.then remain on low speed till above 3k rpm .due to the fmu .im prettty sure that the pump can be direct with the exception of premature pump failure.what could be the starting issue tho?now the fmu had a wire that went too original f/p that cutoff atfter 5 seconds tiill start.is this any issue now that it isnt working like that?idk.am i getting too much fuel or not enough now.?and last is it safe too run my system like this wihou worry of something exploding,?seems like the a/n lines are really hard now ,with it in high speed all the time.ive got a regulator on theyre but can it push enough out as fast as its putting it in?it goes down the rd same as usual just has a starting problem.wth ,this should be fairly easy wire pump direct and go .
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 .
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02' silverado ext. cb 2wd , 5.3 liter 325c.i. LM7, ported and polished throttlebody with bypass, Jannetty Racing 87 octane dyno tune, cold air intake with custom ram air, Heavy duty built 4l60e with vette servo, Z-pac clutches, "The Beast" Sunshell, transgo shift kit, yukon 4.10 gears with true trac, custom exhaust with Moroso Spiralflow, no cats, MSD 8.5 race wires, NGK TR55's
Originally Posted by farmtruc
