NHTSA Complaint #11403890 — 2015 JEEP WRANGLER

CEL ON SCAN FOR CODE PO302 CYLINDER 2MISFIRE. R&R SPARK PLUGS, IGNITION COIL, AIR FILTER, UPPER INTAKE GASKET & CLEAN THROTTLE BODY. PERFORM UPPER INDUCTION CLEANING. FOUND MISFIRE TO RETURN ONLY ON IDLE ON CYLINDER 2. PERFORM COMPRESSION TEST. COMPRESSION SPEC OK. REPLACED PLUGS AND COIL AGAIN. THERE IS A SLIGHT TICK FROM CYLINDER 2 VALVE TRAIN AREA. RECOMMEND GOING TO DEALER. DEALER: ENGINE DOES HAVE A SLIGHT TICK. PERFORMED A COMPRESSION TEST AND LEAK DIWN TEST. FOUND LIW COMPRESSION AND AN 80% LEAK ON THE EXHAUST SIDE OF CYLINDER 2. REMOVED THE CYLINDER HEAD AND FOUND THE EXHAUST VALVES BURNT AND EXCESSIVE PLAY IN THE VALVE GUIDES. REPLACED THE LEFT CYLINDER HEAD, ROCKER ARMS AND LIFTERS. CLEARED CODES AND ROAD TESTED VEHICLE. MISFIRE NO LONGER PRESENT. THIS IS ON A 2015 WRANGLER SAHARA UNLIMITED WITH ONLY 51,892 MILES.