Thermoquad metering rod adjustment ?

Fuel and Air Systems

  1. rustytoolss

    rustytoolss Well-Known Member

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    Does anyone know what the setting is for the metering rods on a thermoquad. I've got the small TQ that has the 1 3/8" primary bores. 9371S , 1981 dodge truck 318
     
  2. dart4forte

    dart4forte FABO Gold Member FABO Gold Member

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    You talking about the set screw that raises and lowers the metering rods?
     
  3. rustytoolss

    rustytoolss Well-Known Member

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    Yes, is there an adjustment spec, or procedure? There is no information in my rebuild kit.
     
  4. RustyRatRod

    RustyRatRod 30 Degrees Outta Whack FABO Gold Member

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    Yes. Depress the metering rod primary piston until it lightly bottoms in the bore. Hold it there. With a small screwdriver, turn the screw counter clockwise until the primary piston stops going down. Then, slowly turn the screw clockwise taking note where the primary piston starts to move up. From the point it begins to move up, turn the screw 1 1/2 turns clockwise. This is a starting point. From there you can fine tune it by turning the screw clockwise to richen the mixture and counter clockwise to lean it.
     
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