TROUBLESHOOTING
Contents
1. Air intake chamber Throttle body ISC valve Pulling in air between air flow meter and throttle body EFI system problems Insufficient fuel flow Incorrect ignition timing Carbon deposits in combustion chambers Repair as necessary Repair as necessary Troubleshoot fuel system Reset timing Inspect cylinder head Repair as necessary Check PCV system Check rings Oil leak PCV line clogged Piston rings worn or damaged EC 4 EM 52 EM 6 ENGINE MECHANICAL Troubleshooting TROUBLESHOOTING Cont d Excessive oil Valve stem and guide worn Check valves EM 27 consumption cont d Valve stem seal worn Check seals EM 52 Excessive fuel Fuel leak Repair as necessary consumption Air cleaner clogged Check air cleaner Incorrect ignition timing Reset timing EF system problems Repair as necessary Injector faulty Deceleration fuel cut system faulty Idle speed too high Spark plugs faulty EGR system always on Low compression Tires improperly inflated Brakes drag Check ISC system Inspect plugs Check EGR system Check compression Inflate tires to proper pressure Troubleshoot brakes Incorrect idle speed Incorrect ignition timing Vacuum leaks PCV hoses EGR valve Intake manifold FI 73 IG 12 Check ISC system Reset timing Repair as necessary Unpleasant odor Air intake chamber2. Throttle body EFI system problems Repair as necessary
3. Inspect distributor Inspect wiring Repair as necessary Inspect plugs Problem Engine hesitates poor acceleration Engine diesels runs after ignition switch is turned o Muffler explosion after fire on deceleration only Muffler explosion after fire all the time Engine backfires Excessive oil consumption EM 5 ENGINE MECHANICAL Troubleshooting TROUBLESHOOTING Cont d Vacuum leaks Repair as necessary PCV hoses EGR valve e Intake manifold Air intake chamber 6 Throttle body ISC valve Pulling in air between air flow meter and throttle body Incorrect ignition timing Emission control system problems cold engine EGR system always on High tension cord faulty Fuel system clogged Air cleaner clogged EFI system problems Spark plugs faulty Engine overheats Low compression Repair as necessary Reset timing Check EGR system Inspect cord Check fuel system Check air cleaner Repair as necessary Inspect plugs Check cooling system Check compression EFI system problems Repair as necessary Deceleration fuel cut system always off Check EFI fuel cut system FI 88 Check air cleaner Repair as necessary Reset timing Air cleaner clogged ER system problems Incorrect ignition timing Check hoses and repair as necessary Vacuum leak PCV hoses EGR valve Intake manifold
4. ENGINE MECHANICAL Troubleshooting TROUBLESHOOTING Engine overheats Cooling system faulty Troubleshoot cooling system CO 4 Incorrect ignition timing Reset timing Engine will not crank Starting system faulty Troubleshoot starting system ST 2 or cranks slowly Engine will not Vacuum leaks Repair as necessary start hard to start cranks OK PCV hoses EGR valve Intake manifold Air intake chamber Throttle body ISC valve Pulling in air between air flow meter and Repair as necessary throttle body Ignition problems Ignition coil Perform spark test Igniter Distributor Ignition wiring disconnected or broken Inspect wirin No fuel supply to injector ee Troubleshoot EFI system No fuel in tank Fuel pump not working Fuel filter clogged Fuel line clogged or leaking EFI system problems oe epair as necessary ISC system problems Check ISC system Spark plugs faulty Inspect plugs Low compression Check compression Rough idle stalls or Vacuum leaks Repair as necessary misses PCV hoses EGR valve Intake manifold Air intake chamber Throttle body ISC valve Pulling in air between air flow meter Repair as necessary and Check ISC system nome Pony EEA test Incorrect idle speed Inspect coil Incorrect ignition timing Ignition problems Ignition coil Igniter Distributor Ignition wiring faulty EF system problems Spark plugs faulty Engine overheats Check cooling system Low compression Check compression
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