TROUBLESHOOTING (Cont'd) Problem | Possible cause | Remedy | Page Excessive oil consumption | Oil leak | Repair as necessary | LU-7 | PCV line clogged | Check PCV system | EC-5 | Piston rings worn or damaged | Check rings | EM-63 | Valve stem and guide worn | Check valves | EM-32 | Valve stem seal worn | Check seals | EM-32 Poor fuel economy | Fuel leak | Repair as necessary | | Air cleaner clogged | Check air cleaner | MA-5 | Incorrect ignition timing | Reset timing | IG-20 | EFI system problems | Repair as necessary | | • Injector faulty | | • Deceleration fuel cut system faulty | | Idle speed too high | Check ISC system | FI-106 | Spark plugs faulty | Inspect plugs | IG-7 | EGR system always on | Check EGR system | EC-12, 16 | Low compression | Check compression | EM-20, 21 | Tires improperly inflated | Inflate tires to proper pressure | | Clutch slips | Troubleshoot clutch | | Brakes drag | Troubleshoot brakes | Unpleasant odor | Incorrect idle speed | Check ISC system | FI-106 | Incorrect ignition timing | Reset timing | IG-20 | Vacuum leak | Repair as necessary | | • PCV hoses | | • EGR valve | | • Intake manifold | | • Air intake chamber | | • Throttle body | | EFI system problems | Repair as necessary |