7.3. Causes and Remedies
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Condition
Causes
Remedies
1) Starting difficult
•
Valve’s poor shut, stem distortion
Repair or replace
(1) Compression pressure
•
Valve spring damage
Replace valve spring
•
Cylinder head gasket’s leak
Replace gasket
•
Wear of piston, piston ring or liner
Adjust
2) Idle operation abnormal
•
Injection timing incorrect
Adjust
•
Air mixing at injection pump
Remove air
3) Engine output insufficient
•
Valve clearance incorrect insufficient
Adjust
(1) Continuous output
•
Valve tightness poor
Repair
•
Cylinder head gasket’s leak
Replace gasket
•
Wear, stick, damage of piston ring
Replace piston ring
•
Injection timing incorrect
Adjust
•
Fuel injection amount insufficient
Adjust injection pump
•
Nozzle injection pressure
Adjust or replace
improper or stuck
•
Supply pump’s function lowered
Repair or replace
•
Fuel pipe system clogged
Repair
•
Air suction amount insufficient
Clean or replace air
cleaner
•
Supercharger poor
Repair or replace
(2) Output insufficient
•
Compression pressure insufficient
Disassemble engine
when in acceleration
•
Injection timing incorrect
Adjust
•
Fuel injection amount insufficient
Adjust injection pump
•
Injection pump timer’s
Repair or replace
function insufficient
•
Nozzle infection pressure,
Repair, replace
infection angle improper
•
Supply pump’s function lowered
Repair or replace
•
Air intake amount insufficient
Clean or
replace air cleaner
Summary of Contents for D1146
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