Toyota 3F-E - ENGINE TUNE-UP

ENGINE MECHANICAL —Troubleshooting
EM-7
POOR GASOLINE MILEAGE
Problem
Possible cause
Remedy
Page
Poor gasoline
Fuel leak
Repair as necessary
mileage
Air cleaner clogged
Check air cleaner
EM-8
Incorrect ignition timing
Reset timing
EM-11
EFI system problems
Repair as necessary
• Injector faulty
•
Deceleration fuel cut system faulty
Idle speed too high
Check ISC system
FI-40,67
Spark plug faulty
Inspect plugs
IG-6
EGR system always on
Check EGR system
Low compression
Check compression
EM-16
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
FI-40,67
Incorrect ignition timing
Reset timing
EM-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
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