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Name this thingamajig

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Blue85, Dec 6, 2000.

  1. Blue85

    Blue85 Troll Premium Member

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    There is a device inside my Quadrajet with two wires coming out of it. What is it? It is a non-computer controller carb (no "dancing needle" linkage and no throttle position sensor). It is in the same location that the mixture control solenoid is in on the electronic Q-Jets. One of the wires coming out of it goes to a temperature sensor in the water neck. When the truck is idling, I can pull the connector out of it and nothing seems to change.

    "All right...who keeps squirting this oil in my driveway?"
     
  2. Burt4x4

    Burt4x4 3/4 ton status

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  3. Emmettology 101

    Emmettology 101 3/4 ton status

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  4. Blue85

    Blue85 Troll Premium Member

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    No. There is an electric (heated) choke, but that is in the choke housing, external to the carb and it hooks up with just one wire. The thing that I'm talking about is down inside the carb with just the connector part sticking up out of the air horn. The fuel inlet is on the front and comes in from the passenger's side. This thing is just above that, on the top of the carb, in front of the air inlet for the primaries.
    I have found no mention of it in the Doug Roe book, either. E4ME carbs had the mixture solenoid in this same cavity in the carb body. Early Q-jets had something there, too, but I'm not sure what. This cavity is on the right (passenger's side) of the fuel bowl. The accelerator pump is on the left side. Does this make it more clear what I am talking about?

    "All right...who keeps squirting this oil in my driveway?"
     
  5. Blazer79

    Blazer79 1/2 ton status

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    The electronic choke should be on the pass. side of the carb. If memory serves well, you're saying that the wire is coming out of the top of the carb on the driver's side and to the front of the carb? My old q-jet had vacuum lines coming from the temp. sensor to the carb, but not wires. What kind of connector do they have?

    If they are wires instead of vacuum lines, then it could be a tracking device installed by a secret tree-hugger organization to find out how much gas you're using [​IMG][​IMG].

    <font color=blue>//////
    http://blazer79.coloradok5.com
    </font color=blue>[​IMG]
     
  6. Blue85

    Blue85 Troll Premium Member

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    Bothe the electric choke and the thingamajig are on the passenger's side. The choke is on the side and the thingamajig is on the top. There are also vacuum lines from different ports on the carb to thermal vacuum switches on the intake manifold and the water neck, but this is seperate from that, it goes to an electrical temperature sensor.

    "All right...who keeps squirting this oil in my driveway?"
     
  7. Mudzer

    Mudzer 1/2 ton status Author

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  8. blazen91

    blazen91 1/2 ton status

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    Mixture control solenoid. I think it is a Calif. smog model carb, but not sure.

    blazen91
    Protect the land FOR the people
    <font color=red>Not FROM the people</font color=red>
     
  9. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    It's a mixture control. the sender on the water neck lets it know it's at full operating temp and leans it out. It's a POS!!!!!! if your having problems with the carb and going to replace it get a carb out of about a 79-80. it will have all the right fitting for vac lines and emmisions but be the old style mechanical mixture deal. That car is also about $75 more expensive than the 79-80 model. the 79-80 will handle your electric choke element so pull that off before you turn it in for your core and put it on the new car. Plug the hot air fittings in the choke bowl and your set.

    Diging it in the dirt with my K5's
    Grim-Reaper
    http://grimsk5s.coloradok5.com/
     
  10. blazen91

    blazen91 1/2 ton status

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    Hey Grim, My 86 Sub has a Quad-jet with out that solenoid. Could it be because it is a 3/4 ton with heavy duty emmisions?

    blazen91
    Protect the land FOR the people
    <font color=red>Not FROM the people</font color=red>
     
  11. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    That would be my guess if your absolutly positive that carb is original to the truck. The 3/4 ton had a less stringent Emmisions requirments. Now somebody mentioned the CCC Carb (mixture control O2 sensor and a TPS). I have heard that it may not have made it on the 49 state trucks at all. I have as yet to see it. It was on the cars plenty.

    Diging it in the dirt with my K5's
    Grim-Reaper
    http://grimsk5s.coloradok5.com/
     
  12. Blue85

    Blue85 Troll Premium Member

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    How does it work to lean the mixture? Does it affect the vacuum signal to the power piston?

    "All right...who keeps squirting this oil in my driveway?"
     
  13. 1HIHUM

    1HIHUM 1/2 ton status

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    It's a flux capasitor{smile][​IMG]

    [​IMG]
     
  14. 1HIHUM

    1HIHUM 1/2 ton status

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    It's a flux capasitor[​IMG][​IMG]

    [​IMG]
     
  15. Blue85

    Blue85 Troll Premium Member

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    You mean flux capacitor. Cool. Now if it breaks or I get stuck, I can just go back in time to before it happened and adjust accordingly.

    "All right...who keeps squirting this oil in my driveway?"
     
  16. 1HIHUM

    1HIHUM 1/2 ton status

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    Exactly![​IMG]

    [​IMG]
     

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