NHTSA Complaint #10366944 — 2007 JEEP GRAND CHEROKEE

1. MY 2007 JEEP GRAND CHEROKEE (5.7 HEMI; 64K MILES) WAS DUE FOR A TUNE UP. I PURCHASED REPLACEMENT SPARK PLUGS THAT WERE RECOMMENDED FROM A LOCAL AUTO PARTS RETAILER AND CHANGED THEM. 2. SUBSEQUENTLY THE VEHICLE BEGAN TO STALL FREQUENTLY WHILE DRIVING (APPROX 5 TIMES IN 25 MILES TRAVELED). THIS HAPPENED WHILE DRIVING AT HIGHWAY SPEEDS, AT STOPLIGHTS AND WHEN MAKING LEFT HAND TURNS. 3. VEHICLE WAS TAKEN TO DEALER FOR SERVICE AS ENGINE LIGHT HAD ALSO BEEN ON DURING ENTIRE TIME. DEALER WORKED ON TRYING TO FIND PROBLEM FOR 3 WEEKS. AFTER CONSULTING A CHRYSLER ENGINEER THEY FINALLY DISCOVERED THAT THE AFTERMARKET PLATINUM TIP SPARK PLUGS WERE CAUSING INTERFERENCE WITH THE VEHICLE POWERTRAIN CONTROL MODULE AND CAUSING THE ENGINE TO STALL. DEALER REPLACED THE SPARK PLUGS AND THE PROBLEM WAS CORRECTED. I WENT BACK TO MY PARTS SUPPLIER AND THEY HAD NEVER HEARD OF THIS PROBLEM BEFORE. I ALSO NOTIFIED CHRYSLER OF MY COMPLAINT THAT CONSUMERS AND PARTS SUPPLY RETAILERS SHOULD BE MADE AWARE OF THIS PARTS INCOMPATIBILITY ISSUE THAT THEY ARE OBVIOUSLY AWARE OF BECAUSE IT IS A POTENTIALLY SERIOUS SAFETY HAZARD. THEY HAVE NOT RESPONDED TO ME. *TR