Jump to content
Ultimate Subaru Message Board

Search the Community

Showing results for tags 'module'.

  • Search By Tags

    Type tags separated by commas.
  • Search By Author

Content Type


Forums

  • Welcome to the USMB!
    • Meet n' Greet. Your USMB Welcome Center
    • Members Rides
  • Older Generations of Subaru's 1960-1994 Except Legacy and Impreza
    • Historic Subaru Forum: 50's thru 70's
    • Old Gen.: 80's GL/DL/XT/Loyales...
  • Newer Generations of Subaru discussion
    • 1990 to Present Legacy, Impreza, Outback, Forester, Baja, WRX&WrxSTI, SVX
    • BRZ and its Sister the Scion FRS/Toyota GT86
    • Crosstrek "XV"
  • Marketplace
    • Ultimate Subaru Store
    • Products for your Subaru
  • Upgrading and Racing Discussion
    • Performance Tech Forums
    • Subaru Modifications
    • Subaru MotorSports
  • Ultimate Subaru Repair Manual-The Knowledge Base of USMB. Complied posts and writeups to common problems and projects.
    • Submit a Tip or Mod to the USRM
    • Product Links and References
    • The old Ultimate Subaru Repair Manual
    • Engine
    • Engine Electrical
    • Transmission, Axle, and Brakes
    • Heating and Cooling systems
    • Body Exterior
    • Interior / Body Electrical
    • Stereo tips and tricks
    • Offroad Modifications
    • Suspension and Steering
  • Off Topic Areas
    • Shop Talk
    • Alternative Vehicles (non soob)

Product Groups

  • Member Accounts
  • Ultimate Subaru Decals
  • Subaru Parts
    • Weber Carbs and Parts
    • Used Subaru Parts

Find results in...

Find results that contain...


Date Created

  • Start

    End


Last Updated

  • Start

    End


Filter by number of...

Joined

  • Start

    End


Group


AIM


MSN


Website URL


ICQ


Yahoo


Jabber


Skype


Location


Interests


Full Real Name


Occupation


Ezboard Name


Referral


Biography


Vehicles

Found 1 result

  1. 1984 GL-10 Hardtop Coupe FWD. EA81, Carter/Weber carburetor. Fuel pump isn't operating. If I provide fuel down the carburetor the engine will run properly until I stop fueling. Replaced fuel pump, and distributor (to provide proper ignition signal, the shaft had some play). I'm focusing on the Fuel Pump Control Unit (FPCU), but I'm not in a position where I can afford to experiments with a $150 new one without being fully convinced that it will remedy my situation. I need actual diagnostic information about this box specifically. Does anyone know the actual function of the FPCU? First off I'm a Subaru dealership technician, so I'm certainly not shooting blind, but I can't find any actual information about the operation of the FPCU. Using the factory service manual, Haynes, and Chiltons manuals I've been able to find almost nothing of what kind of output this module produces. The manuals all basically say " if power and ground are there, tach signal is coming in, then the pump will run." Yes, that's wonderful, but run how? From what I've figured the pump produces a pulsing power signal, since the pump does nothing and blows the breaker in the Powerprobe after a moment when I supply power and ground directly to the pump. A replacement pump (new) had the same result leading me to believe the pump needs a on-off pulsing power source to operate the plunger solenoid. Followup question: Has anyone ever found a way to bypass the FPCU? if it were as easy as a switch or a relay to provide bypassed power to the pump I would have done that, but that was not successful. Can any of the components inside the FPCU be replaced (resistors, capacitors, etc). I implore you USMB and your fountain of knowledge! ~Erik
×
×
  • Create New...