Toyota 3F-E - After Fire, Backfire; Engine Dieseling; Excessive Oil Consumption; Troubleshooting

ENGINE MECHANICAL —
Troubleshooting
EM-6
ENGINE DIESELING
Problem
Possible cause
Remedy
Page
Engine diesels
(runs after ignition
switch turned off)
EFI system problems
Repair as necessary
AFTER FIRE, BACKFIRE
Problem
Possible cause
Remedy
Page
Muffler explosion
(after fire) on
deceleration only
Deceleration fuel cut system always off
Check EFI (fuel cut) system
Muffler explosion
Air cleaner clogged
Check air cleaner
EM-8
(after fire) all the
ti
me
EFI system problem
Incorrect ignition timing
Repair as necessary
Reset timing
EM-11
Engine backfires
EFI system problem
Repair as necessary
Vacuum leak
•
PCV line
e EGR line
Check hoses and repair as
necessary
•
Intake manifold
•
Air intake chamber
•
Throttle body
•
ISC valve
•
Brake booster line
Pulling in air between air flow meter
and throttle body
Repair as necessary
Insufficient fuel flow
Troubleshoot fuel system
FI-9
Incorrect ignition timing
Reset timing
EM -11
Incorrect valve clearance
Adjust valve clearance
EM-10
Carbon deposits in combustion chambers
Inspect cylinder head
EXCESSIVE OIL CONSUMPTION
Problem
Possible cause
Remedy
Page
Excessive oil
Oil leak
Repair as necessary
consumption
PCV line clogged
Check PCV system
Piston ring worn or damaged
Check rings
EM-45
Valve stem and guide bushing worn
Check valves and guide
bushing
Valve stem oil seal worn
Check seals
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