EM-4 ENGINE MECHANICAL — Troubleshooting TROUBLESHOOTING ENGINE OVERHEATING HARD STARTING ROUGH IDLING Problem Possible cause Remedy Page Engine overheats Cooling system faulty Incorrect ignition timing Troubleshoot cooling system Reset timing EM-11 Problem Possible cause Remedy Page Engine will not crank or cranks slowly Starting system faulty Troubleshoot starting system Engine will not start/ hard to start (cranks OK) No fuel supply to injector • No fuel in tank • Fuel pump no working • Fuel filter clogged • Fuel line clogged or leaking EFI system problems Ignition problems • Ignition coil • Igniter • Distributor Spark plug faulty High-tension cords disconnected broken Vacuum leaks • PCV line • EGR line • Intake manifold • Air intake chamber • Throttle body • ISC valve • Brake booster line Pulling in air between air flow meter and throttle body Low compression Troubleshoot EFI system Repair as necessary Perform spark test Inspect plugs Inspect cords Repair as necessary Repair as necessary Check compression FI-9 IG-5 IG-6 IG-6 EM-16 Problem Possible cause Remedy Page Rough idle, stalls or misses Spark plug faulty High-tension cord faulty Ignition problems • Ignition coil • Igniter • Distributor Incorrect ignition timing Vacuum leaks • PCV line • EGR line • Intake manifold • Air intake chamber Inspect plugs Inspect cords Inspect coil Inspect igniter Inspect distributor Reset timing Repair as necessary IG-6 IG-6 IG-7 IG-5 IG-7 EM-11