How to set the startup idle on an AVS

Posted By: ashburnmike

How to set the startup idle on an AVS - 01/17/09 12:58 PM

Hello all.
When I start the 340 on these cold days (not as cold as some of you guys out there) I sit in the car and hold the gas petal to idle @ around 1300 until the motor warms up or it will idle down and conk out.

Once she warms up, it idles just fine (now that the motor is grounded properly, thanks again for the help straightening that out

)

Isn't there a screw adjustment on an AVS that upon initial startup, you step the petal, turn the key, start the car and it would "fast idle" by itself until you step on the petal again, at which time it would return to a standing idle.

Am I making sense here?

Posted By: Dodgem

Re: How to set the startup idle on an AVS - 01/17/09 01:37 PM

Yes there is a stepped lever that works in conjuntion with the choke that has it's own idle screw. when you pump (open throttle) to give it initial shot of gas then release it should click into place as choke closes by this same action. then you can set the fast idle it will hold open till you depress gas a bit I called it kicking it of fast idle.

Posted By: rrunner

Re: How to set the startup idle on an AVS - 01/17/09 01:42 PM

Yes, but you will need to check your choke thermostat on the intake first. Does the choke now work but you are just missing fast idle?

Posted By: ashburnmike

Re: How to set the startup idle on an AVS - 01/17/09 02:01 PM

I think I'm just missing the fast idle adjustment.

There is a screw near the intake on the drivers side, underneath the throttle assembly that is in contact with an "curved anvil" like piece that is attached to a piece of linkage the resembles a backward "C" connecting to a lever on the upper portion of the AVS near the bowl.

It seems to be independant of the Throttle cable function.

Am I in the right neighborhood?

Posted By: Dodgem

Re: How to set the startup idle on an AVS - 01/17/09 02:12 PM

That sounds like it.
Open carb and let chock close then it should be positioned to set

Posted By: ashburnmike

Re: How to set the startup idle on an AVS - 01/17/09 02:22 PM

ok.

I pulled the throttle back. the linkage in question moved a tad "up".
The screw is still in contact with the anvil piece @ a slightly different spot.

Posted By: rrunner

Re: How to set the startup idle on an AVS - 01/17/09 02:24 PM

Quote:

ok.

I pulled the throttle back. the linkage in question moved a tad "up".
The screw is still in contact with the anvil piece @ a slightly different spot.

Did the choke stat fully close the choke butterfly when you opened the throttle?

Attached picture 4953774-Choke002-Copy.JPG

Posted By: ashburnmike

Re: How to set the startup idle on an AVS - 01/17/09 02:35 PM

Quote:

Quote:

ok.

I pulled the throttle back. the linkage in question moved a tad "up".
The screw is still in contact with the anvil piece @ a slightly different spot.

Did the choke stat fully close the choke butterfly when you opened the throttle?

I'm thinking it did not.
The position of my screw is on the same side of the step (which I see now, thank you for the picture) as yours,

but no where near as far up the slope as your is.

I will adjust to match yours, see how it goes and report back.

Posted By: rrunner

Re: How to set the startup idle on an AVS - 01/17/09 04:08 PM

The pic shows with the choke butterfly fully closed. First thing to do is start with the car FULLY cold, remove the air cleaner and open the throttle. The choke butterfly should then fully close, if it doesn't you need to look at the choke stat. If it does adj the screw pictured in, I go more than I know I will need and back it off from there.

Posted By: ashburnmike

Re: How to set the startup idle on an AVS - 01/17/09 06:26 PM

Quote:

The pic shows with the choke butterfly fully closed. First thing to do is start with the car FULLY cold, remove the air cleaner and open the throttle. The choke butterfly should then fully close, if it doesn't you need to look at the choke stat. If it does adj the screw pictured in, I go more than I know I will need and back it off from there.

Good to go now.

Thanks

Mike