TROUBLESHOOTING Problem | Possible cause | Remedy | Page Engine overheats | Cooling system faulty | Troubleshoot cooling system | CO-2 | Incorrect ignition timing | Reset timing | IG-10 Engine will not crank or cranks slowly | Starting system faulty | Troubleshoot starting system | ST-2 Engine will not start/ Hard to start (cranks OK) | Vacuum leaks • PCV hoses • EGR valve • Intake manifold • Air intake chamber • Throttle body • ISC valve | Repair as necessary | | Pulling in air between air flow meter and throttle body | Repair as necessary | FI-58, 63 | Ignition problems • Ignition coil • Igniter • Distributor | Perform spark test | IG-4 | Ignition wiring disconnected or broken | Inspect wiring | | No fuel supply to injector • No fuel in tank • Fuel pump not working • Fuel filter clogged • Fuel line clogged or leaking | Troubleshoot EFI system | FI-8 | EFI system problems | Repair as necessary | | ISC system problem | Check ISC system | FI-60 | Spark plugs faulty | Inspect spark plugs | IG-5 | Low compression | Check compression | EM-6 Rough idle, stalls or misses | Vacuum leaks • PCV hoses • EGR valve • Intake manifold • Air intake chamber • Throttle body • ISC valve | Repair as necessary | | Pulling in air between air flow meter and throttle body | | FI-58, 63 | Incorrect idle speed | Check ISC system | FI-60 | Incorrect ignition timing | Reset timing | IG-10 | Ignition problems • Ignition coil • Igniter • Distributor | Perform spark test Inspect coil Inspect distributor | IG-4 | Ignition wiring faulty | Inspect wiring | | EFI system problems | Repair as necessary | | Spark plugs faulty | Inspect plugs | | Engine overheats | Check cooling system | CO-2 | Low compression | Check compression | EM-6