84 Riviera 307 black box on drivers valve cover

Discussion in 'A boatload of fun' started by buicksg, Sep 23, 2019.

  1. buicksg

    buicksg Well-Known Member

    What is this for? Has an electrical connection on 1 side and looks like 2 vacuum lines coming out the other side. Says "AC Delco" on the side. It's a black plastic rectangular box on top of the drivers side valve cover near the back of the engine. This is the Olds 307 engine.
     
  2. buicksg

    buicksg Well-Known Member

    I think it has a vac line going to the egr as well?? Is it for both cruise and egr?
     
  3. buicksg

    buicksg Well-Known Member

    After looking at it again it does not appear to be connected to the cruise control but more to the EGR valve, is this an EGR module?
     
  4. gsx455-4ever

    gsx455-4ever Gold Level Contributor

    A picture of the part would be better than guessing .
     
  5. buicksg

    buicksg Well-Known Member

  6. buicksg

    buicksg Well-Known Member

  7. Briz

    Briz Platinum Level Contributor

    That is what acts as a computer. It controls timing and emissions and I believe also is tied in with the feed back carb. That car is a nightmare of hoses and wires. After I replaced the engine in mine I took it to the Buick dealer and had all of that replaced and correctly routed. 400$
     
  8. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD"

  9. Briz

    Briz Platinum Level Contributor

  10. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD"

    I'm not sure what the OP is talking about. This box?

    307Box.JPG
     
  11. buicksg

    buicksg Well-Known Member

    Yes that is the box in question what does it do?
     
  12. Briz

    Briz Platinum Level Contributor

    If I had it to do over again I would delete all that power robbing crap off the top of the engine. Drop in a regular HEI and a non feedback Q jet and be done with it.
     
  13. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD"

    That is hard to say. You need to trace all the connections to that box. You have the car, I can't see in the picture.
     
  14. Briz

    Briz Platinum Level Contributor

    Its tied into the distribitor and the carb along with many of the sensors
     

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