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

EM-6
Problem
Engine diesels
(runs after ignition
switch turned off)
Problem
Muffler explosion
(after fire) on
deceleration only
Muffler explosion
(after fire) all the
ti me
Engine backfires
Problem
Excessive oil
consumption
ENGINE MECHANICAL —

ENGINE DIESELING

Possible cause
EFI system problems

AFTER FIRE, BACKFIRE

Possible cause
Deceleration fuel cut system always off
Air cleaner clogged
EFI system problem
Incorrect ignition timing
EFI system problem
Vacuum leak
•
PCV line
e EGR line
•
Intake manifold
•
Air intake chamber
•
Throttle body
•
ISC valve
•
Brake booster line
Pulling in air between air flow meter
and throttle body
Insufficient fuel flow
Incorrect ignition timing
Incorrect valve clearance
Carbon deposits in combustion chambers

EXCESSIVE OIL CONSUMPTION

Possible cause
Oil leak
PCV line clogged
Piston ring worn or damaged
Valve stem and guide bushing worn
Valve stem oil seal worn

Troubleshooting

Remedy
Repair as necessary
Remedy
Check EFI (fuel cut) system
Check air cleaner
Repair as necessary
Reset timing
Repair as necessary
Check hoses and repair as
necessary
Repair as necessary
Troubleshoot fuel system
Reset timing
Adjust valve clearance
Inspect cylinder head
Remedy
Repair as necessary
Check PCV system
Check rings
Check valves and guide
bushing
Check seals
Page
Page
EM-8
EM-11
FI-9
EM -11
EM-10
Page
EM-45