I arrived home after a short 10 minute drive. I shut the engine off. Just 1 minute later I wanted to start the truck and move it into the garage. It would not start and I think I found out why. There was no fuel in the carb. No leaks, glass bowl on the fuel pump had some, but not full of fuel. Any thoughts, I did a search and found some ideas but none were specific to my problem. Jim
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maybe carb problem
- Thread starter jim deale
- Start date
Hi Jim ;
Heat Soak can and does boil the fuel out of carbys, more so now with the ethanol laced gasoline we get these days .
Before touching the carby you *must* take the time to re check the valves for proper (or any !) gaps, then check the points (33 degrees dwell) and then set the ignition timing to ball on pointer dead nuts, engine idling at 700 RPM or less .
Once you have done this , undo the carby's top ("Air Horn") abd lift it 1/4" or so and peer in at the fuel level in the float bowl .
The fuel level inside it should be within 1/4" of the flat top of the float bowl .
Sometimes the hard start issue is the fuel has boiled over and flooded the intake manifold, the test is simple : engine fully warmed up depress the accelerator to the floor and hold it there as you crank the engine, key on .
If it's flooded it should begin to cough and try to start soon, do not let off the throttle until the engine is running on all six cylinders but don't mindlessly over rev. it either .
Heat Soak can and does boil the fuel out of carbys, more so now with the ethanol laced gasoline we get these days .
Before touching the carby you *must* take the time to re check the valves for proper (or any !) gaps, then check the points (33 degrees dwell) and then set the ignition timing to ball on pointer dead nuts, engine idling at 700 RPM or less .
Once you have done this , undo the carby's top ("Air Horn") abd lift it 1/4" or so and peer in at the fuel level in the float bowl .
The fuel level inside it should be within 1/4" of the flat top of the float bowl .
Sometimes the hard start issue is the fuel has boiled over and flooded the intake manifold, the test is simple : engine fully warmed up depress the accelerator to the floor and hold it there as you crank the engine, key on .
If it's flooded it should begin to cough and try to start soon, do not let off the throttle until the engine is running on all six cylinders but don't mindlessly over rev. it either .
Hi Nate;
All you have mentioned has been double checked. If I remove the carb and set it on cardboard fill the bowl part way and see if it leaks. If it does leak would that provide me the information I am looking for? A possible needle seat problem
All you have mentioned has been double checked. If I remove the carb and set it on cardboard fill the bowl part way and see if it leaks. If it does leak would that provide me the information I am looking for? A possible needle seat problem
No need to remove the carby from the engine, just lift off the air horn .
You said 'has been checked' but _not_ what you discovered when checking for the proper float level .
Once in a blue moon the venturi in the center of the float bowl cracks and allows fuel to dribble into the intake manifold and flood the engine .
I'm not seeing any detailed specific description of what's happening .
You said 'has been checked' but _not_ what you discovered when checking for the proper float level .
Once in a blue moon the venturi in the center of the float bowl cracks and allows fuel to dribble into the intake manifold and flood the engine .
I'm not seeing any detailed specific description of what's happening .
I check the float level and float travel. Found no adjustment needed. The excellerator pump is working fine. As I examine every possibility I have found 2 things. 1- carb back fires when initial acceleration is applied and 2 the throttle shaft leaks outside the carb at the end when squirting fuel into the carb. Engine off.
I doubt you've properly checked the fuel level as I described .
Might want to take a look at the Bakelite insulator between the carby and intake manifold, the weeping of raw fuel at the throttle shaft is normal and correct .
Might want to take a look at the Bakelite insulator between the carby and intake manifold, the weeping of raw fuel at the throttle shaft is normal and correct .