89TurboV6

I read in a rochester carb book that the computer powers on and off the m/c soleinoid so what is controling it in my non-cc q-jet? How do replace the air valve tension spring I think I distorted mine

five7kid

iTrader: (14)

A power piston. Vacuum pulls metering rods down into the main jets, reducing the flow through them. More throttle, less vacuum, a spring pushes the rods out of the jets richening the mixture.

I've never heard of an AV spring being replaced. Some place like the Carb Shop or Jet may be able to handle it, though.

89TurboV6

I don't know if you misunderstod me or if I misunderstod you but I mean my car has a m/c solenoid but no computer. Do you mean the power piston is controling the m/c solenoid? There is a red wire and a green wire coming from m/c solenoid, the green wire plugs into the sensor in the t-stat housing.

Your guys help means alot its hard trying to make sense of these canadian carbs when all the books talk about the american ones!

five7kid

iTrader: (14)

I got the "it" wrong, you're right (I was thinking "mixture").

However, you didn't ask the right question, because you don't have a mixture control solenoid.

The solenoid you do have is part of a two-stage accelerator pump. When cold, it allows a stronger shot from the pump. When the engine warms up, it cycles and only allows a smaller shot.

83_1/2 L69

Removing the AV spring is easy.

Loosen the locking set screw that is under the adjustment "screw".
Unhook the spring from the AV shaft arm.
Remove the adjustment "screw" by pulling it out of its hole. This thing is not really a screw, it's just a shaft with notches cut into each end. The inner notch is for holding the spring, the outer notch is where your screwdriver goes when making tension adjustments.

89TurboV6

Will having this disconnected affect how my car runs when cold?

five7kid

iTrader: (14)

Might stumble more as you depress the accelerator.