Toyota Land Cruiser 1988 Repair Manual page 36

ENGINE MECHANICAL-
Troubleshooting
EM-5
POOR GASOLINE MILEAGE
Problem Possible cause Remedy Page
Poor gasoline
Fuel leak
Repair as necessary
mileage
Air cleaner clogged Check air cleaner MA-5
Incorrect ignition timing Reset timing IG-11
EFI system problems Repair as necessary
• Injector faulty
• Deceleration fuel cut system faulty
Idle speed too high Check ISC system Fl-40,71
Spark plug faulty
Inspect plugs IG-6
EG R system always on Check EG R system EC-11
Low compression
Check compression EM-10
Tires improperly inflated
Inflate tires to proper pressure
Brakes drag
Troubleshoot brakes
UNPLEASANT ODOR
Problem Possible cause Remedy Page
Unpleasant odor Incorrect idle speed Check ISC system Fl-40,71
Incorrect ignition timing Reset timing IG-11
Vacuum leaks
Repair as necessary
• PCV line
• EGR line
• Intake manifold
• Air intake chamber
• Throttle body
• ISC valve
• Brake booster line
EFI system problems Repair as necessary