Been with this group for almost 20 years but I’m stuck on an issue and would appreciate any help. My jet diaphragms were cracked and leaking and I replaced them. After fixing the various gas leaks, the car starts right up on the starting carburetor. As soon as the carburetor cuts out, it barely runs and then stops. I do have a hidden bypass switch and when I flick on the starting carburetor it runs again and will accelerate normally I did warm up the engine while on the starting carburetor. Both seem to be sucking air normally and the pistons are free and moving. Symptoms indicate it is running too lean. The mixture is set at the factory setting (2 1/2 turns down from highest jet point). Idle speed screws are also set at factory setting. Plugged the brake servo so no leak there. Don’t think it’s timing as it was running fine before. Any ideas out there in Jag-Lovers land?