Page text (OCR transcript)
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
