Rebuilt Carter W-O Acceleration Problem

Hello,

My Willys Pickup just hit 10K the other day when she suddently started getting harder and harder to start. I was quite confused about this, but then one day it died on me.

Figuring it was just a carb old issue, i just last night finished putting a rebuild on it.

Installed it and it started up, and idled AMAZINGLY. Problem it's having now, is when I hit the gas, it almost cuts out before idling up, once it is at high RPM's it stays there just fine, but getting it up there takes alot of very rapid and quick smacks of the gas pedal. When the throttle is opened up half way and kept there, the engine will stall out, and it makes a very loud vacuum sound through the air cleaner. Timing as all set, both marks are exactly aligned, and the distributor is good too..




What do y'all think?

 

Sounds like air/fuel mixture is wrong. Have your tried adjusting it?

 

Oh, and another thing, the accelerator pumps in today's rebuild kits can get eaten up by the gas, FYI. You might want the check it out while the gaskets are new and aren't stuck to the carb.

 

Have you tried running it with partial choke?

 

Ironically if I put her at full choke there is NO bogging or anything, but the idle mixture screw is out 1 1/2 turns as per kit instructions

 

The mixture screw is for idle. Anything above idle and that screw is out of the circuit. I suspect you have a big vacuum leak. You are running very lean and the choke is richening the intake system.

 

i just gave the vacuum system a once-over and no leaks. I did make the float level 3/8" and per kit instructions made the idle screw 1 1/2 turns out. Do you think the timing of the accelerator pump could be off? Could it be kicking in too late? I tend to think it has something to do with that because the engine will sustain high RPM just fine, as well as low RPM but only has a problem getting them up?.
........... Haha my Willys can't get it up.......

 

I had this same problem after a rebuild. Do a search for "Carter WO metering rod gauge". The adjustment of the metering rod is very critical. Mine had all the same symptoms, and properly adjusting the metering rod solved the problem.

 

What i found this morning after some tinkering: Well, I got it idling amazingly. When the throttle is pushed, there is a great stream of fuel into the carb through that little pipe suspended above the throttle shaft, but the accelerator pump seems to engage quite late, what I did was straighten out the shaft between the accelerator pump rocker arm thing and the cam system on the other side of the throttle shaft.......

Where is the metering rod? the little needle looking thing that goes into the fuel bowl?

 

i do not understand the point of the metering rod gauge, is it to make sure the rod sits in the hole and not off to the side? or is it the set the length of the rod? should i compare the old and new ones looking for a size difference?

 

Is your float sticking, try taping on side of carb see if float frees up

 

The metering rod meters the fuel going into the carb on when you are off idle, subsequently it affects the amount of fuel during acceleration. The rod is adjusted by the nut and pin at the top of the rod. The length is very critical. Too far into the fuel bowl starves for fuel, not far enough down, causes too much fuel to enter the carb. Every symptom you are describing I solved on mine with proper adjustment of the metering rod. Try this link, it really helped me:http://mightymo.org/Proj_Carter_WO_Rebuild.html

 

oh i get it now, makes sense that its starving considering I drove the rod all the way down when i disassembled and rebuilt the carb.