Good accomplishments but still need help.

[thenewguy65]

Ok guys, I am proud of myself for getting this far. I have changed my intake, don't appear to have any leaks and I got my car started. Put a stock 4 barrel intake and carb on the car. Autolite.

The carb has been rebuilt by me and now I am having idle issues.
The car idles ok but the minute I tap the gas, and it seems like the carb sticks at that point and doesn't return back to a lower idle speed.

The throttle return spring has good tension and snaps back when I move it by hand.

Another question, what is the correct float height ?

 

[68torinogt]

ill bet its the choke. is it electric choke?

 

[thenewguy65]

No...it's an automatic choke. I am open to suggestions about it. What's the best way to set the choke properly. It's a pain getting to some of those screws .

 

[thenewguy65]

Also...I turned the idle/fuel screws at the front of the carb and nothing changed, I don't know if that helps

 

[dennis112]

Can you manually slow the rpm by manually moving the throttle to the closed position? Try disconnecting the throttle linkage and see if if it returns to idle.

Is the choke fully open? The carb could be running on the fast idle setting.

Could have a vacuum leak.

 

[thenewguy65]

I am still not sure how to troubleshoot this. It cranks up without tapping the gas at all. Nice idle. The minute I tap the gas it stays at that rpm speed.

 

[68RCodeConv]

Check to see if the primary butterflys are binding. Very common in an old, worn carb. If you can force them shut by hand then you might need to get a stronger return spring or adjust the butterflys on the throttle shaft.

 

[krash kendall]

Also...I turned the idle/fuel screws at the front of the carb and nothing changed, I don't know if that helps

You need a vacuum guage to set those properly. If you can turn those all the way in with the car idling and the car doesn't stall, then you may have a vacuum leak causing the fuel to bypass the idle curcuit under the carb. The solution in that case is to tighten the carb down more. You did use a new gasket didn't you?

 

[thenewguy65]

It appears I do need a strong return spring. If I pull it back by hand, it returns to a normal idle no problem. I have the proper bracket on the carb for the spring I just need to get a new stronger one. I will look to see which vendor carries them. I looked and a few didn't seem to carry them.


I did use new gaskets. I have another set because I know this is a learning process and I can screw up so I felt like it couldn't hurt to have a second set.

I have a new vacuum gauge as well but I haven't been able to use it just yet. I figure it doesn't make sense to adjust those til I get it to work I can move the linkage back and forth without it sticking.