My 4runner missfires around 2400 to 2700 rpm. Runs fine at other rpms once warm on 1990 Toyota 4Runner

When started it runs rough until warming up. New plugs, wires, distributor cap, rotor. No codes. Ran fine before radiator change which doesn't make sense. Shop wants to replace the distributor just to see if it helps.

Asked by for the 1990 Toyota 4Runner
Possible issue with distributor, have a shop diagnose with a scope.
Thanks for the response. We paid a shop diagnose the problem. They scoped it and couldn't find the issue. They wanted to change the distributor for $780 and see if it helped or not. If it didn't they were going to keep changing parts.