Bucking 86 5.2L lean-burn

Discussion in 'General Motoring' started by r_s_bogar, Jun 10, 2005.

  1. r_s_bogar

    r_s_bogar Guest

    I have a 1986 Gran Fury with 5.2L/2BBL and "Lean Burn" feedback
    carb. Occasionally, when cruising at higher speed, (typically around 75
    MPH, but can happen at 45) when throttle goes from just above idle to a
    little farther open, does several seconds of severe "bucking" or
    surging. Troubleshooting has been: replacing carb with non-feedback
    type didn't help. Blocking off EGA didn't help. Swapping out
    computer unit reduced frequency of occurrence, but didn't stop
    problem entirely. Disconnecting and plugging vacuum to computer stops
    problem, but causes loss of power and open-loop, gas wasting carburetor
    operation. Vehicle needs to keep lean-burn stuff on to pass MD emission
    inspection. Engine otherwise runs well, passes inspection with 1/10
    allowable emissions. Alldata doesn't show any TBs for this.
    Has anyone else seen this sort of problem, or have any suggestion?
     
    r_s_bogar, Jun 10, 2005
    #1
  2. r_s_bogar

    Bob Shuman Guest

    Sounds possibly like a fuel delivery problem. How about the gas filter,
    pick up sock or fuel pump?
     
    Bob Shuman, Jun 10, 2005
    #2
Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Similar Threads

  1. Lean air/fuel mixture on 95 Eagle Vision (difficult cold start)

  2. 1987 Fifth Avenue - Lean Burn Question

  3. 1998 Plymouth Grand Voyager Bucking with Speedometer going haywire

  4. '83 Chrysler 5th Ave bucking

  5. "Bucking" with '86 318 lean-burn

  6. Chrysler fuel mixture lean - how to fool the PCM?

  7. 1977 chrysler lebaron lean burn question

  8. Lean Code 96 Grand Wagoneer

Loading...