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  #1  
Old 09-29-2012, 11:48 AM
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1999 F350 dually 1999 F350 dually is offline
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early 99 powerstroke fuel routing

doing some random searches recently i found this statement posted:

"the late 99 and up powerstrokes have a dead-head fuel rail"

of course this could just be some yayhoo posting bad info, but i do not know. can anyone tell me- do the early 99's have a return line coming from the fuel rail? i have recently completed a wvo conversion that was designed on the assumption that the rail was dead-headed; if not i am sending wvo back to my diesel tank. no bueno. truck is parked until i get this figured out. i have tried to look in there but cannot tell.

thanks in advance.
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  #2  
Old 09-29-2012, 01:35 PM
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Dead, dead, dead. The flaws in the Superduty/Powerstroke fuel system:
  1. Fuel starts in a fuel line with Quick-Disconnects to make dropping the tank easier. When the fuel gets low in the tank (about 1/4 tank), gravity stops pushing the fuel in the line and the pump starts to create a vacuum in the fuel line. QDs have o-ring seals, and these suck at sealing... well.... suction.
  2. Any air in the line from a bad o-ring seal enters the fuel bowl and the pressure regulator bleeds much of the air back to the tank - where a mixing chamber lies in wait. It then makes sure the air feels welcome with the fuel by mixing it with fresh fuel from the pickup - like a nosey aunt trying to pair you up with her friend's daughter. The air mixture gets a proper mixing with this aerate, return, aerate - until the fuel bowl makes a nice bubble bath and the injectors get a foam diet.
  3. There is no fuel pass-through on the head - except through the injectors. There is a threaded port on the end of each head for installing a test gauge, but the factory kept these pre-occupied with plugs.
  4. Back to the tank... there is a funnel-shaped pickup in there that sometimes falls off. Off! Leaving a tube at mid-tank tring to suck fuel up by... I dunno... Magic?
Cures? I have links in my signature for the Hutch mod and the FRx.
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Old 09-29-2012, 03:35 PM
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Dwayne Dotson
Mine is dead headed. The SQUARE plugs on the early 99 for a FRx is at the rear of the drivers side head in a small inset that the intake plenum has curved into it. Same thing on the passenger side rail except the SQUARE plug is on the front.
Dwayne
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Dwayne Early 1999 F250 2WD Extended cab. 190k B.E.S.T. Map CCV re-route, 50 cent mod, EBPV delete w/ blank pedestal, Resistor installed, 6637 filter w/pete's cover, Used 38R and Intl Up pipes(thanks for the great deal and getting that clamp back on...Jason), billet Plenums, new boots and clamps, AE, Stancor style GPR $38 http://www.aerialequipmentparts.com/...586-105111.htm. Window tint, Hutch and Harpoon mod, Parts on bench: HPOP re-seal kit, ICP, IPR, CPS, FRx, 4 way heater hose valve for cold AC mod, .
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Old 09-29-2012, 03:39 PM
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Dwayne Dotson
If you plan on installing the FRx from Riffraff then you will have to grind on the up-pipe to collector connection on the drivers side for the new fitting. The late 99-03 has that connection 3/4 inch higher and you do not need to grind on the metal. I am going to wait to upgrade to the late99-03 setup with bellowed up pipes and a GTP38R after the fall this year.
Dwayne
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Dwayne Early 1999 F250 2WD Extended cab. 190k B.E.S.T. Map CCV re-route, 50 cent mod, EBPV delete w/ blank pedestal, Resistor installed, 6637 filter w/pete's cover, Used 38R and Intl Up pipes(thanks for the great deal and getting that clamp back on...Jason), billet Plenums, new boots and clamps, AE, Stancor style GPR $38 http://www.aerialequipmentparts.com/...586-105111.htm. Window tint, Hutch and Harpoon mod, Parts on bench: HPOP re-seal kit, ICP, IPR, CPS, FRx, 4 way heater hose valve for cold AC mod, .
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Old 09-29-2012, 05:41 PM
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thanks guys. stellar and useful information as usual.
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Old 09-29-2012, 05:41 PM
 
 
 
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