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.
Toyota Q&AAsk Your Question
1990 Toyota 4Runner Question: My 4runner missfires around 2400 to 2700 rpm. Runs fine at other rpms once warm
Answer #1your.mechanic November 26, 2012, 23:37Master
Possible issue with distributor, have a shop diagnose with a scope.
Replybeebow, November 27, 2012, 09:20Rookie
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.