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Fuel Pump Question

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by KRAZIE87K5, Mar 19, 2001.

  1. KRAZIE87K5

    KRAZIE87K5 1/2 ton status

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    Does anyone know if the 86 K5 has electronic fuel pump??? I am trying to install a 454, and I need to know if I need to look into a pressure regulator. I am installing a 750cfm 4150 Holley for the 454, and if the truck has a elec. pump, I'm sure I will have to tone it down some so I don't make the Holley unhappy :-(

    Suggestions???? Thanks all!
     
  2. pr1aw

    pr1aw 1/2 ton status

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    Looking at the Specs it says that fuel injection started in 87. Going from this info you should have a mechanical fuel pump on the engine. Make sure the 454 has a mechanical pump or you could go with an aftermarket electric fuel pump that puts out about 6PSI pressure. If you want run a higher volume get a 12PSI and run a fuel pressure regulator. To much pressure will unseat the needle valve in the float bowl and cause a flooding situation.
     
  3. 90K5

    90K5 1/2 ton status

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    I helped a guy replace his...actually I replaced it while HE watched...on an '86 C20 and it was electric.

    90K5

    See my truck at <A target="_blank" HREF=http://albums.photopoint.com/j/Albumindex?u=1329584&a=9886502>http://albums.photopoint.com/j/Albumindex?u=1329584&a=9886502</A>
     
  4. KRAZIE87K5

    KRAZIE87K5 1/2 ton status

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    I was never lucky enough to see the factory installed 350... I bought the truck minus drivetrain. I spose that I could look for a harness at the tank, right? Could the VIN tell me anything do you think?
     
  5. pr1aw

    pr1aw 1/2 ton status

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    That was my next suggestion, look at the tank for wires going to it. If so, then you might be lucky because the orginal had a carb on it and the electric fuel pump will be of the proper pressure. I would still hook up a fuel pressure tester to see how much pressure though.
     

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