Excessive Black Smoke; Check Items Before Troubleshooting; Problem: Excessive Black Smoke - Mitsubishi L Series Service Manual

TROUBLESHOOTING

1.5 Excessive black smoke

1.5.1

Check items before troubleshooting

(1) Clogging of air cleaner element
(2) Use of poor quality fuel
(3) Overload
1.5.2

Problem: Excessive black smoke

Is the smoke set amount of
the fuel injection pump normal?
YES
Is the engine correctly adjusted
(valve clearance excessive,
fuel injection timing out of order)?
YES
Are fuel injection nozzles normal (spray state,
injection-valve opening pressure too high)?
YES
Is the compression pressure normal?
YES
Inspect fuel injection pump
14-6
NO
Adjust smoke set
NO
Adjust engine
NO
Inspect fuel injection nozzles
NO
Inspect valves, cylinder head gasket, pistons and piston rings
Problem: Excessive black smoke