Hi!

I rebuild my quadrajet. I have a 1984 Trans Am all Stock LG4 305.

When the car is warm everything is fine.
Now i´m adjusting the choke.

My question: should the high idle cam automaticly drop down or must i hit the gas?

The car starts with 2000RPM the choke plate opens slowly, but the rpm doesn´t go down.

Hope you know what i mean!


Thanks alot
Martin

 

You must open the throttle in order to release the high idle cam.

The force of the throttle return spring will be enough for the high idle set screw to hold the high idle cam up, even though the choke butterfly has opened.

Basic carb operation for every carb with a choke and high idle cam that I've seen.

 

Hi!

Thanks alot!

That helps!

Martin

 

Ok so i go to crank up the bird and the rpms shoot up to 4000 rpms at the start up and stays there ...... also blowing a ton of smoke ..... what the hell is the problem? this is all on a cold start and it does it every single time.... what causes this pain in the @ss?