Have Classic Car Questions? Ask an Expert.
Hello, white smoke is a sign of water in the combustion chamber. This will cause a misfire, resulting in unburnt fuel and a sputter at idle.
I would suggest pulling the spark plugs and checking for any that look fuel or water soaked. Turn the vehicle over with the plugs removed and see if you have water coming out of any of the cylinders. You can also perform a compression test to se if any cylinders are off.
Let me know what you find and I will be happy to help further if needed.
Very possible and common on these older trucks. Often times when restoring these vehicles I tend to go with a weber carb to eliminate that system and improve tuneability and performance.
Hello. Different expert here. Could you please post a picture of your carb? I may have additional information for you. Thanks
In the last picture sent, locate the center screw with a spring on it. Counting carefully, turn it counter clockwise, counting each full turn. remove the screw. Examine the end of the screw or send a photo. See if the end of the screw is blunt or a sharp point. When you put the screw back, make sure you have the right amount of turn inward as you removed it.
On the front of the carb, to the right of the glass window is a vacuum diaphragm. See if it smells like gasoline inside of it.
Let's put it all back together and start it up. Observe the fuel window. Then move the screw in and out a turn either way and advise if the engine runs differently
Please tell me how many turns it takes until the screw stops ...Go slow and gently. Do not force the screw in too far. Count the clock wise turns until it stops.
Please reset the screw to stop at 4 1/2 turns then retest
Is the air cleaner installed? This is very important that it is in place
Let the engine cool. off completely when cold, remove the lid of the air cleaner and start the engine. When it starts to sputter place a rag over 1/4 of the choke plate opening. See if the idle smooths up.