Toyota 3F-E - Page 62

EM -6
ENGINE MECHANICAL —
Troubleshooting
ENGINE DIESELING
Problem
Possible cause
Remedy
Page
Engine diesels
EFI system problems
Repair as necessary
(runs after ignition
switch turned off)
AFTER FIRE, BACKFIRE
Problem
Possible cause
Remedy
Page
Muffler explosion
Deceleration fuel cut system always off
Check EFI (fuel cut) system
(after fire) on
deceleration only
Muffler explosion
Air cleaner clogged
Check air cleaner
EM-8
(after fire) all the
EFI system problem
Repair as necessary
ti
me
Incorrect ignition timing
Reset timing
EM-1 1
Engine backfires
EFI system problem
Repair as necessary
Vacuum leak
Check hoses and repair as
•
PCV line
necessary
• EGR line
•
Intake manifold
•
Air intake chamber
•
Throttle body
•
ISC valve
•
Brake booster line
Pulling in air between air flow meter
Repair as necessary
and throttle body
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
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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