My summer project has been to pull the front sheet metal off my truck and clean the engine and replace the gaskets, paint, etc. I'm almost done putting things back together and I have learned quite a bit through the whole process. I'm now at the point to where I'm trying to get it started and I'm running into one issue after another and I think so far I've been able to solve them. But now I've run into a problem with my carburetor and I'vefinally relented into asking for some help. I think my carb is putting out too much gas. When I try to start it backfires up through the carb. When I take the carb off, there seems like an excessive amount of gas sitting in the bottom of the intake. Now let me tell you what I've done.
1. Cleaned and Rebuilt carb..including new accelerator pump plunger check valve balls and gaskets
2. New needle, put in the right way
3. Measured float height... 5/64 inch from to of the bowl
4. Several adjustments of idle mixture screw starting at 1 1/2 turn out
5. Original fuel pump which worked fine before I started this project.
I also checked the timing several times using TDC on cylinder 6. My distributor is indexed at 7 o'clock. I have my plug wires lined up in the correct sequence 153624
Its probably an easy fix, but I can't see what I'm missing