Carb Bog

[Boone83K10]

When you put the cap on, are you putting the choke flap linkage end into the cap slot, so the it moves the flap?

 

[John81287]

Yep it's got that little arm in the little notch on the cap and when I turn it to line up the mark in the center of the little scale on the carb I can feel a little resistance from the spring. But it still doesn't move the flap.


Sent from somewhere in Northern Illinois!

 

[Boone83K10]

Maybe the spring is turning with the cap instead of coiling in. Take the cap of and put a pen in the bi metal spring loop andtry to coil tight (be gentle), if it moves freely and doesn't coil then the bi metal spring is faulty

 

[John81287]

I will try that tomorrow, thanks for workin me through this maybe I'll get to drive the truck one of these says


Sent from somewhere in Northern Illinois!

 

[John81287]

Change in plans I'm gonna do it niw


Sent from somewhere in Northern Illinois!

 

[John81287]

Spring does not spin freely, what next? I'm gonna retract my previous statement about the lever being fairly easy to move. It's pretty stiff!


Sent from somewhere in Northern Illinois!

 

[Boone83K10]

It's binding somewhere..it should be very loose because a small bimetal spring is what moves the choke flap.

 

[Boone83K10]

also could be the piston inside the choke is stuck. a paper clip with a small bend at the end, stuck down the rod shaft can help break it loose.

 

[MrMarty51]

I have loosened it and move it both directions with no change to the flap.


Sent from somewhere in Northern Illinois!

Try opening the throttle, maybe a 1/4 open and try moving the choke arm and see if it is a little easier.

 

[John81287]

Try opening the throttle, maybe a 1/4 open and try moving the choke arm and see if it is a little easier.

Hi Marty!
Looks like I had one of the screws tightened down too much on the flap linkage. Loosened it up a bit and the cap now moves it. Cap doesn't adjust far enough forward to close it fully on startup though, wondering if I fugged it up in my attempts to make it work.


Sent from somewhere in Northern Illinois!

 

[MrMarty51]

UHHHHhh, probably not.
Try pushinbg the pedal to the floor/shove the throittle fully open, then the choking will probably fully close and set the fast idle screw onto a step of the fast idle cam, then the choke can be swung open/closed without any resistance, if the fast idle cam screw is properly adjusted.

 

[350runner]

It won't be close ask the way on start up

Sent from the dust in front of you!

 

[Boone83K10]

according to Edelbrock, it should have an opening of .100 of an inch when set and fully cold. So that is real small, 2-3 mm. I had to open my Holley up to about 1/4 inch because it was choking out when cold.

Let engine cool overnight, come out and with air cleaner off, open throttle all the way up and release. Choke flap should slam shut and set the fast idle screw on the cam.

 

[MrMarty51]

Before the engine is started:
tromp the pedal to the floor. That action should set the choke fully closed and also set the fast idle adjustment screw onto a cam of the fast idle assembly.
After the engine starts:
The "choke pull off diaphram assembly" should open the choke a ways to keep the engine from being fully choked and allowing a lot of raw fuel to build up and flood the cylinder walls.
The fast idle cam should engage to keep the engine from dying, I`m thinking about 1000 rpms on fast idle.
The heated coil draws the choke open as the engine warms.