'74 FJ40 original 1.5F, with JimC rebuilt stock carb (rebuild was 15 years ago). FJ60 ignition system.
When driving up hills at sustained high RPM (might be first gear up a steep farm field, or 2nd gear up a steep paved mountain road, the engine starts to stumble. Since highway speeds in 3rd or 4th gear are not an issue I don't think it is solely RPM related. Otherwise no running issues, starts easily cold or hot, idles smoothly, runs 70 on the interstate (as long as it's flat).
I've wondered if it is a fuel issue- perhaps bowl height? Welcome any pointers as I begin to dive i
When driving up hills at sustained high RPM (might be first gear up a steep farm field, or 2nd gear up a steep paved mountain road, the engine starts to stumble. Since highway speeds in 3rd or 4th gear are not an issue I don't think it is solely RPM related. Otherwise no running issues, starts easily cold or hot, idles smoothly, runs 70 on the interstate (as long as it's flat).
I've wondered if it is a fuel issue- perhaps bowl height? Welcome any pointers as I begin to dive i