Car Problem Reports
Jeep Wrangler Check Engine Light due to cylinder #3 misfire
Jeep Wrangler Problem
Engine Affected: 4.0L 6 Cylinder
A Check Engine Light may illuminate indicating a "Cylinder #3 Misfire." This normally occurs in hot weather after the vehicle has been driven, parked for ten to twenty minutes, and then restarted. Heat from the exhaust vaporizes fuel inside the #3 fuel injector and causes the misfire. Installing an insulator sleeve normally lowers the temperature enough so the fuel will not vaporize.