I think I need to replace my tension spring in my q jet and was wondering if anyone knows how to do this. I looked in my manual and didn't see anything mentioning the tension spring. any advice will help. oh yeah the tension spring is what keeps your av flaps down just incase somebody wanted to know.

 

You need to get yourself a torx screwdriver, and remove the air-horn from the top of the Carb. With the air-horn upside down, and the secondary side facing towards the rear.... you'll see the tension spring found on the upper right side of the air-horn.

However, I doubt you need a new spring.... you probably need to adjust you're stock one. If the the engine 'bogs' when you give it hard throttle, it's too loose and opening way too soon, if the engine 'hesitates' upon hard throttle, then it's too tight.

Edit: Just wanted to add.... most people adjust their secondaries (tension spring) without taking off the air-horn, but if you're unfamiliar with how it actually works, it might be a good idea to remove the air-horn so you can get a good visual of it by lifting it upside down. To either tighten the spring, or loosen the spring, you'll need a very small screwdriver and allen wrench (but you'll see just how small of tools you'll need, when the air-horn is off).

 

The easiest way to SEE what you are doing is use a small mirror and a flashlight. No mechanics tool box is complete without a dental inspection mirror.
DO NOT tear your carb apart unless you have the skills to reassemble it correctly.

To answer your question about AV tension spring removal:
1. Loosen the locking set screw about ½ turn.( this is what the mirror is for, this screw is on the bottom of the air-horn plate, under the tension adj screw)
2. Un-hook the spring from the AV shaft.
3. Slide out the tension adj “screw” by pulling it out of the carb. It’s not really a screw. It’s a shaft with a slot cut into each end. One slot grips the spring, the other slot is where you put a screwdriver blade when turning it to adj tension.
4. The spring should freely drop out of the carb.

Now you need to answer a question: Why do you think your spring is bad? That spring is under so little tension normally, it seems impossible for it to go bad. We do have to lubricate the shaft where the spring slides up/down as the AV opens and closes. I had a problem once with the AV shaft binding due to the air-horn warping because all of the mounting screws on the passenger side of the carb had come loose!

 

See his previous post. Turned the adjustment a bunch of turns the wrong way.

 

thanks guys for your advice, sorry i couldnt repley earlier but got busy at work. anyways I was doing a carb mod that I explained on a previous post but I ended with my av flaps staying open. I can close them by hand then they will flop back open. Its like they have no tension to keep them closed. Iam not sure i have to replace the spring but from what i heard its the only thing that provides tension for the av flaps.

 

It might just be uh-hooked. take a look.