I have what seems to be a unique issue.
89 Wrangler 4.2, nuttered, only emissions that remains is the vapor canister. Installed Weber 36 DGEV, new plugs/wires, new fuel filter and pump, coil and cap looks new from the PO. Installed Borla header, new intake (stock version) new catalytic converter, and muffler.
At idle the engine runs perfectly and seems to be timed near perfect. Under light acceleration it runs up to 3-4k rpm smoothly and the second barrel of the carburetor opens with no hesitation. Now same scenario but heavier acceleration and once the throttle reaches the point of opening the second barrel it falls flat on its face like it is getting no fuel and then will run up no fine after a second of the hesitation.
Any ideas? I've had no luck calling weber tech support, will continue calling to see if they think it is a jet issue or accelerator pump.