Engine Hesitates Or Poor Acceleration; Engine Dieseling; Excessive Oil Consumption - Mitsubishi MONTERO 1989 Service Manual

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26
INTRODUCTION AND MASTER TROUBLESHOOTlNG
- Master Troubleshooting
ENGINE HESITATES OR POOR ACCELERATION
Symptom Probable cause
Engine hesitates or
poor acceleration
-I
Ignition system problem
Vacuum leaks
l
Purge control valve hose
l
Vacuum hoses
- intake manifold
l
Air intake plenum
* Carburetor or throttle body
l
EGRvalve
ENGINE DIESELING
Reference
page or remedy
8-147 to 149
Repair as
necessary
Air cleaner clogged
Fuel line clogged
113.10
1442.99
Carburetor or fuel injection system problem
Auxiliary acceleration pump faulty (cold engine)
Emission control system problem
l
EGR system always on
- High-altitude compensation (HAC) system problem
Engine overheats
14-34.90
14-23
25-77.22.32
7-4
Compression too low g-II.65
I
Symptom Probable cause
I
Reference
page or remedy
I
I
I
I -..
Engine dieseling (runs after
ignition switch is turned off)
Carburetor problems
Incorrect ignition timing
14-34
8-14710 149
EXCESSIVE OIL CONSUMPTION
Symptom Probable cause
Reference
page or remedy
Excessive oil consumption Oil leak
Positive crankcaseventilation line clogged
Valve stem seal worn or damaged
Valve stem worn
Piston ring worn or damaged
Repair as
necessary
o-13
Replace
Replace
9-43
1 TSB Revision