Wagon falls on its face

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  • LeftVentricle
    Right aorta
    • Oct 2005
    • 506

    #1

    Wagon falls on its face

    This is a new one. The wagon has suddenly developed a possible fueling problem. I've made a video of the symptom, which can be viewed at the following address: http://www.youtube.com/watch?v=O80WK8kMzOk

    In summary, when you open the throttle, regardless of what gear it is in, it will bog down severely, sometimes enough to stall. It's more pronounced when in a drive gear, either forward or reverse. Could this be the throttle position sensor, the fuel filter, or the fuel pump? ICM and coils are somewhat new (about a year and a half old), and fuel injectors are about two years old. Fuel filter is nearly three years old, and the pump is of unknown vintage, possibly stock. Also, I later discovered that what I unhooked was actually the IAC, and the TPS is directly below that. I don't think it's the TPS, because I just went out there and undid it with the engine running and it died.
    Kaiser George IX: 1996 Buick Century Special wagon. 213-SFI. 250k miles. Never gonna give you up, never gonna let you down. First documented LX9 swap in an A-body! Click here to read my build thread!
  • 3400-95-Modified
    The Pink Car
    • Dec 2005
    • 4375

    #2
    Put a fuel pressure gauge on it and see what happens when you go WOT, I'm willing to bet the pump can't keep up and the pressure is dropping off like a rock.

    Got Lope?
    3500 Build, Comp XFI Cam 218/230 .050 dur .570/.568 lift 113LSA
    Fully Balanced, Ported, 3 Angle Valve Job, 65mm TCE TB, S&S Headers.
    Stage-1 Raybestos/Alto 4t60e-HD, EP LSD, 3.69FDR
    12.61@105 Epping NH Oct 2015 Nitrous 100shot (melted plugs) 13.58@98.8 N/A 3200LBS

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    • Superdave
      Been there, Built that.
      • Sep 2004
      • 5850

      #3
      Originally posted by 3400-95-Modified View Post
      Put a fuel pressure gauge on it and see what happens when you go WOT, I'm willing to bet the pump can't keep up and the pressure is dropping off like a rock.
      x2


      Also check the MAP sensor.
      Past Builds;
      1991 Z24, 3500/5 Spd. 275WHP/259WTQ 13.07@108 MPH
      1989 Camaro RS, ITB-3500/700R4. 263WHP/263WTQ 13.52@99.2 MPH
      Current Project;
      1972 Nova 12.73@105.7 MPH

      Comment

      • LeftVentricle
        Right aorta
        • Oct 2005
        • 506

        #4
        I had a friend of my brother's put a fuel pump and filter in for $40, and it runs better than ever now.
        Kaiser George IX: 1996 Buick Century Special wagon. 213-SFI. 250k miles. Never gonna give you up, never gonna let you down. First documented LX9 swap in an A-body! Click here to read my build thread!

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