My van smokes black smoke. Doesn't that mean that all the fuel is not being burnt? I just check plugs and timing to correct the problem, right?
B-300
02-27-2008, 02:11 PM
Black smoke is excess fuel. Blue smoke is oil
87318
02-27-2008, 03:28 PM
Thats what I thought. Now to correct the problem.
B-300
02-27-2008, 04:05 PM
Are you running a carb and if so which one? I would guess a piece of debris is caught in the float valve. The Thermoquad and Carter AFB carbs (4bbl) have 2 float valves, one in each side.
87318
02-27-2008, 04:18 PM
i have the stock carb. i just rebuilt it
87318
02-27-2008, 04:19 PM
holley 2bbl
B-300
02-27-2008, 04:29 PM
I did seach back and found that it's a rebuilt 2bbl.
The problem I have encounted most often is that when a fuel filter is changed a sharp edge on the tubing can cut a sliver of rubber off the hose and cause the float needle not to seat correctly.
stev
02-27-2008, 06:44 PM
Once you get the black smoke to stop, clean the PVC valve and crank case breather.
Dodgevanman
02-28-2008, 09:12 AM
Does it happen even with the choke fully open?
87318
02-28-2008, 10:46 AM
It only does it when its cold. After the engine warms up its fine.
alloro
02-28-2008, 11:16 AM
Sounds like your choke is not opening enough right after the engine starts. Check your "choke pull off" adjustment and it's vacuum modulator to see if it's working.
