86 Cutluss Supreme

I have a 305 V8 4 barrel Cutlass Supreme. Starts ok but as soon as it reaches normal temp the car starts to lose power and starts to hesitate. I have changed the spark plugs, distribute cap, rebuilt the carb.Any ideas what I can do next?

I have a 305 V8 4 barrel Cutlass Supreme. Starts ok but as soon as it reaches normal temp the car starts to lose power and starts to hesitate. I have changed the spark plugs, distribute cap, rebuilt the carb.Any ideas what I can do next?


Joe--sounds a bit like the catalytic converter might be about stopped up. Disconnect it from the exhaust pipe at the front end and see how it runs then. I've had that problem with mine. Ed--86CS