The ABCs of Carburetion

UM-900 (1959)

 

Page 15 of 19

TROUBLE SHOOTING TIPS Continued
FLOAT SYSTEM
(Hooding, rough idle, surge)
1.  Check seat for tightness in casting.
2.  Is the needle smooth both on the point and the top?
 
 
 
PART THROTTLE SYSTEM
(poor economy, surge)
1. Check size and approach angle of metering jets.
tmp8F4-1.jpg
tmp8F4-2.jpg
2. Are the jets and fuel passages free of dirt or obstruction?
POWER SYSTEM
(surge, low top speed, hesitation)
3.  Does the needle valve seat properly to prevent flooding?
4.  Check float adjustment.
IDLE SYSTEM
(rough idle, stalling)
1.  Check float adjustment, engine idle speed adjustment.
2.  Check for vacuum leaks.
tmp8F4-3.jpg
tmp8F4-4.jpg
1. Are the vacuum channels and power restric­tion free of carbon, dirt, or obstruction?
tmp8F4-5.jpg
3. Are the idle channels and throttle bore free of carbon and dirt?
tmp8F4-6.jpg
2. Is the power piston worn or damaged?
tmp8F4-7.jpg
4. Are the idle needles free of burrs?
3. Is the actuating spring distorted?
15

<PREVIOUS PAGE    INDEX    NEXT PAGE >

 

INFORMATION FOR PRE - 1960 CHEVROLETS

 

WebCounter says that you are visitor number:

Please Report any Broken Links or Pages that do not load properly.  Webmaster

This Information is for Research and the Promotion of the Preservation of Older Chevys

All Names, Trademarks and Logos Belong to their Respective Owners.

 

Web Space Provided by TOCMP