Q-jet choke info 7040207 (70 L-46)

[Dennis D.]

I've been around the block with this a couple of times with no success. Trying again. For lack of a better term, I'll call it an assist spring for the choke coil. I've seen this spring attached as it is in the photo,(1), and I've seen it not attached to the slot in the vacuum break.. Attached as in the photo my choke closes easily. It does seem to take longer for the choke coil to overcome the assistance from the spring. So the fast idle is on way to long.

However, if I do not connect the spring end to the vacuum break, and it rests on the lever directly below the slot,(4), there is no assitance because the spring is wrapped around the same lever, and my choke coil has a problem closing.The rest of the spring is coiled around the shaft, behind the peened over oval end of that lever(2). The other end of the spring is visible sticking straight out the bottom of the lever(3). The linkage moves freely, the choke coil is new and correct, the choke rod is new and also correct.

I'm hoping someone knows exactly what this spring is, its function and how it attaches. Thanks in advance.

[Clem Z.]

Re: Q-jet choke info 7040207 (70 L-46)

the picture is correct where the spring goes. the choke adjustment is in the rod,"top of rod even with the bottom of the hole". shorting or lengthening the rod changes the choke timing because more or less tension on the thermal spring

[Dennis D.]

Re: Q-jet choke info 7040207 (70 L-46)

Is the thermal spring the piece I'm referring to, or the thermo coil on the intake?

I didn't think of the rod length effecting tension. More of a gauge for setting when the choke blade is shut. Bottom rod to stop in coil, line up rod top with bottom of hole, as you say.

If the thermal spring IS the spring I refer to, or at least if it installs as shown, then the rod length would effect it's tension. (didn't think of that)

Wonder if I can get a balance between the coil pulling when cold, and the spring I refer to, having a bit less tension so the coil can open easier when warming up. Going to check my rod length again.