Happy St. Patty's Day and welcome to Packard Motor Car Information! If you're new here, please register for a free account.  
Login
Username:

Password:

Remember me



Lost Password?

Register now!
FAQ's
Main Menu
Recent Forum Topics
Who is Online
23 user(s) are online (18 user(s) are browsing Forums)

Members: 1
Guests: 22

Bob J, more...
Helping out...
PackardInfo is a free resource for Packard Owners that is completely supported by user donations. If you can help out, that would be great!

Donate via PayPal
Video Content
Visit PackardInfo.com YouTube Playlist

Donate via PayPal




1929 Carb Too Rich
#1
Home away from home
Home away from home

jimw
See User information
The carb on my 1929 640 runs too rich. The float is set right and the air valve is set to factory measurements. Runs rich at idle and loads up. Sooty exhaust.

Attach file:



jpg  IMG_5119 (2).JPG (352.28 KB)
1238_638d348f66f63.jpg 1599X1703 px

Posted on: 2022/12/4 19:00
 Top  Print 
 


Re: 1929 Carb Too Rich
#2
Home away from home
Home away from home

29tons
See User information
Take the float out and put in warm water hold it under the water and look for bubbles. I have had several of the floats leak

Posted on: 2022/12/5 12:57
 Top  Print 
 


Re: 1929 Carb Too Rich
#3
Home away from home
Home away from home

jimw
See User information
float is good, no leaks

Posted on: 2022/12/5 15:19
 Top  Print 
 


Re: 1929 Carb Too Rich
#4
Webmaster
Webmaster

BigKev
See User information
Float valve not properly sealing?

Posted on: 2022/12/5 18:54
-BigKev


1954 Packard Clipper Deluxe Touring Sedan -> Registry | Project Blog

1937 Packard 115-C Convertible Coupe -> Registry | Project Blog
 Top  Print 
 


Re: 1929 Carb Too Rich
#5
Home away from home
Home away from home

jimw
See User information
Brand new needle and seat.

Posted on: 2022/12/5 22:45
 Top  Print 
 


Re: 1929 Carb Too Rich
#6
Home away from home
Home away from home

Tim Cole
See User information
Is the car still using the vacuum tank? If not, is the new needle and seat calibrated to handle higher pressure than gravity feed?

There is supposed to be a bleed passage that pulls fuel above the throttle plate at idle the same way as idle air bleeds on a downdraft carburetor. If that is clogged the motor will load during idle.

Posted on: 2022/12/6 9:42
 Top  Print 
 


Re: 1929 Carb Too Rich
#7
Home away from home
Home away from home

jimw
See User information
Tim

Still using the vacuum tank, which works well. I have heard about the bleed passage, but have never been able to identify where it is in the carb. Are you talking about the carb pictured in the first post above or the later carb?

Posted on: 2022/12/6 10:01
 Top  Print 
 


Re: 1929 Carb Too Rich
#8
Quite a regular
Quite a regular

pmhowe
See User information
Jim,

According to Dykes Manual, rough idling and loading up at low throttle can be caused by an air leak or a plugging of the suction tube that goes from the bottom of the carburetor to the intake manifold. The remedy is to clean it and its connections and reinstall. Hope this helps.

Phil

Posted on: 2022/12/6 23:12
 Top  Print 
 


Re: 1929 Carb Too Rich
#9
Quite a regular
Quite a regular

Phillip Weeks
See User information
Here is a quick check to see if the spring setting on the air valve is correct. If the valve is pressed down slightly to open it, does the engine run rougher. Then push the valve closed by pressing on the end of the stem that is in the air intake above the choke butterfly. The engine should also run a bit rougher. If one way improves the running the air valve spring adjustment may need to be moved to either increase or decrease the tension.

Posted on: 2022/12/7 16:38
 Top  Print 
 








Search
Recent Photos
Photo of the Day
Recent Registry
Website Comments or Questions?? Click Here Copyright 2006-2024, PackardInfo.com All Rights Reserved