Weber32/36 has no gas in the bowl car only running on 3 cylinders

chope97

chope97

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This is a continuation of my rough running post. After checking lots stuff and fixing all kinds of small stuff and making improvements along the way. I took the carb apart and found no gas in the bowl it was dry. I checked everything and found no obvious problems cleaned all the jets and passages out with carb cleaner. I also cleaned the filter too Put everything back and still no gas squirting into the bowl. I ordered a rebuild kit that should be here Friday. I checked the floats by letting them touch some water in a pale and the floated up. I checked the supply hose and gas was coming out didn't check how much. Stay tune I have been woking with these carbs for many years all the way back to my first Bavaria in the 80's.
 
Does it have an electric idle jet, if so, does it click when you remove and attach the power source? This would not explain a totally empty bowl.
 
The gas in the bowl comes through the needle and seat directly into the bowl. There is no other impediment to the fuel.
Do you get fuel from the hose connected to the carb fuel inlet? If there's pressure there, the problem has to be in the short distance from the inlet to where the fuel drops into the bowl.
 
There is a little spring loaded plunger within the needle to cushion the needle as it contacts the seat. This plunger can get frozen in the fully extended position which will not allow the float to raise and allow gas to enter the bowl. I don't know if this is the case here but worth checking.
 
Success so far, I took the top off the back carb and cleaned all the jets and air correction tubes, I took the floats out and checked to make sure they were still floating. I also cleaned the inside of the carb I also measured the float open and closes levels. I had someone crank the car while i watched how much gas came out into a jar. I also connected the top of the carb to the supply hose and watched gas come out from the open needle. All looked good. So maybe the carb needed a good cleaning. I test drove it for about 15 miles and it drove well. It starts right up now on the first turn. I may take the top off the other carb and clean it out too, very easy to do. This is fun to me, fixing stuff and seeing the results of improved performance.. So this adventure resulted in the following repairs

1. replaced fuel filter
2. replaced Allison elec ignition with a Pertronix - car ran better
3. Replaced plugs (Bosch) after 7 years with NGKs - car ran better
4. checked timing made minor adjustment using vacuum gauge - car ran better
5. Took top off carb and cleaned out all jets and bowl once I found out it was not working due to no gas getting in (no more loss of power)
6. replaced coil with new one I had in my part dept
7, Checked carb base bolts, some were loose tightened them, replaced internal filter
8, checked linkage to make all was working and not binding
0. Checked gas cap gasket was loose on new cap replaced with old one
10. fixed vapor hose leak in trunk
11. checked gas tank found ground wire was disconnected (gauge might work now)
 
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