My 1911 has suddenly started running poorly uphill. It bucks,spits and almost dies. I have removed the carb, cleaned it and replaced it ( tested the fliat and it was good), i also replaced the in line filter. When i disconnect the fuel line at the carb i get a nice steadt stream of fuel. Sometimes the car will not make it up the hill, sometimes it doesnt have TOO much trouble. Problem is not consistant. It only happens in high gear.
Try the flow from the drain under the carb too - will confirm the float valve isn't stuck. If it's a ball valve = Grose jet, it may be the cause of trouble..
Did you check & clean the timer?
If you are using a paper filter, I would also remove and test without it. The paper filter units are known to cause fuel flow issues.
What carb are you using? another thought is the float, is it adjusted correctly? What is the float material?
I suspect the magic words may be "in line filter", especially if you have only two or three gallons in the tank. On level ground, one gallon isn't enough and two are plenty. But climbing a hill, especially with a filter, changes that. Ditch the filter and try it with a full tank and see what happens.
William ; Throw away that IN LINE FILTER as far as possible.
Definitely the filter. I had the same problem! I was almost stranded and found out that the filter had to go. Having no way to connect the ends of the fuel line together on the side of the road, I stabbed several holes in the paper element inside a bunch of times with a coat hanger, and reinstalled the fangled thing.
A problem with a paper filter is that if there are small particles in the gas, it will clog the filter. If it ran with the filter for quite a while and then suddenly stopped running good, I would suspect the filter might be clogged and a replacement might correct the problem.
The Model T was made to run with a sediment bulb under the gas tank with a screen in it and the screen could also get clogged. So there is another possible cause. If you have a good sediment bulb and screen, it is not usually necessary to run an in line filter.
One of my 26s came with a filter on it and it never ran right stumbled and sputtered and as soon as I drained the tank and removed the filter never a problem again. Just what happened with my car.
Any water at all can stop the flow in a paper filter.
I had this problem several years ago.I would run with the best of them in the morning of our tour. In the afternoon, I would have the problems you describe. The issue was I had a full tank of gas starting in the morning and by afternoon I was down to 1/2 tank or less. The pressure of the gas in the tank kept it from vapor lack. I increased the size of the gas line and made sure it was as far away from heat as I could. NO PROBLEM since. Dick C.
Agreed with all the others---and I learned the hard way too as I thought I knew more than these guys. Take that filter and throw it far away. A sediment bowl on the tank is more than adequate.
Also, make sure your fuel line goes down from the tank, and around the pan ear area starts to go back up to the carb and maintains that up ward angle. My line I had made went up from the pan ears toward the carb, but then I put another bend in it and it went slightly back downward before the carb fitting causing an airlock at times.