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vacuum switch

Discussion in '1982-Present GM Diesel' started by René, Aug 5, 2002.

  1. René

    René 1/2 ton status

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    Which function has the vacuum switch at the fuel filter?
     
  2. Hans_de_Wilt

    Hans_de_Wilt Registered Member

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    On my '84 CUCV it's only for the diagnose connector under the dash (according the wiring diagram).

    Hans. NL http://move.to/chevy4x4
     
  3. René

    René 1/2 ton status

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    Is it possible that the part calls itself also Restriction SWITCH?
     
  4. DieselDan

    DieselDan 1/2 ton status

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    I <font color="blue">think</font color> that restriction sender should trigger the (change) fuel filter light on the dash. CUCV's didn't have the light but the sender was wired to the STE-ICE connector for diagnosis.
     
  5. René

    René 1/2 ton status

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    Thus I imagined that. Thats probably only to reminding lazy people of the changing intervals. Before a few days, I have had the pleasure to refuel a dirty fuel. The warning lamp lit up, but the engine ran completely normally. A few minutes after the warning lamp gone out, the engine began too run hardly and had power loss. This play went now so for a long time till I changed the filter. Its probably like that, that I can do without the small lamp

    Thanks for the information.
     
  6. NewK5Guy

    NewK5Guy 1/2 ton status

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    As water builds up in the filter, the flow of fuel will become restricted. I think the pressure switch can turn on the water in fuel light as a backup to the water level detector. Something like that. It's a backup to the water detector. I've heard many stories about the pressure switches going bad and having terrible reliability so people were jsut unplugging them.
     

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