Mitsubishi Montero (1998+). Manual — part 352

Vacuum leak Repair vacuum leak

Improper float bowl fuel Reset float

level adjustment, see FUEL

Clogged air bleed or idle Clean carburetor

passages passages, see FUEL

Clogged or worn air cleaner Replace air filter

filter

Faulty choke vacuum Replace diaphragm,

diaphragm see ENGINE PERFORMANCE

Exhaust manifold heat valve Replace heat valve

inoperative

Improper distributor spark Check distributor

advance operation

Leaking valves or valve Check and repair

components valvetrain

Improper carburetor Remove and remount

mounting carburetor

Excessive play in Replace distributor

distributor shaft

Loose or corroded wiring Repair or replace as

connections required

Engine Surges Improper PCV valve airflow Replace PCV valve

Vacuum leaks Repair vacuum leaks

Clogged air bleeds Remove restriction

EGR valve malfunction Replace EGR valve

Restricted air cleaner Replace air filter

filter

Cracked or broken vacuum Replace vacuum hoses

hoses

Cracked or broken ignition Replace ignition

wires wires

Vacuum advance malfunction Check unit and

replace as necessary

Defective or fouled spark Replace spark plugs

plugs

Ping or Spark Incorrect ignition timing Reset ignition timing

Knock see ENGINE PERFORMANCE

Distributor centrifugal or Check operation and

vacuum advance malfunction replace as necessary

Carburetor setting too lean Readjust mixture

setting, see ENGINE

PERFORMANCE

Vacuum leak Eliminate vacuum leak

EGR valve malfunction Replace EGR valve

Poor Gasoline Cracked or broken vacuum Replace vacuum hoses

Mileage hoses

Vacuum leaks Repair vacuum leaks

Defective ignition wires Replace wires

Incorrect choke setting Readjust setting, see

ENGINE PERFORMANCE

Defective vacuum advance Replace vacuum advance

Defective spark plugs Replace spark plugs

Binding carburetor power Eliminate binding

piston

Dirt in carburetor jets Clean and/or replace

jets

Incorrect float adjustment Readjust float

setting, see FUEL

Defective power valve Replace power valve,

see ENGINE PERFORMANCE

Incorrect idle speed Readjust idle speed

Engine Stalls Improper float level Readjust float level

Leaking needle valve and Replace needle valve

seat and seat

Vacuum leaks Eliminate vacuum

leaks

VACUUM PUMP - DIESEL TROUBLE SHOOTING

NOTE: This is GENERAL information. This article is not intended

to be specific to any unique situation or individual vehicle

configuration. The purpose of this Trouble Shooting

information is to provide a list of common causes to

problem symptoms. For model-specific Trouble Shooting,

refer to SUBJECT, DIAGNOSTIC, or TESTING articles available

in the section(s) you are accessing.

NOTE: Diesel engines mechanical diagnosis is the same as gasoline

engines for items such as noisy valves, bearings, pistons,

etc. The following trouble shooting covers only items

pertaining to diesel engines.

VACUUM PUMP (DIESEL) TROUBLE SHOOTING CHART

CONDITION POSSIBLE CAUSE CORRECTION

Excessive Noise Loose pump-to-drive Tighten screws

assembly screws

Loose tube on pump assembly Tighten tube

Valves not functioning Replace valves

properly

Oil Leakage Loose end plug Tighten end plug

Bad seal crimp Remove and re-crimp

seal

MANUAL TRANSMISSION

MANUAL TRANSMISSION TROUBLE SHOOTING

NOTE: This is GENERAL information. This article is not intended

to be specific to any unique situation or individual vehicle

configuration. The purpose of this Trouble Shooting

information is to provide a list of common causes to

problem symptoms. For model-specific Trouble Shooting,

refer to SUBJECT, DIAGNOSTIC, or TESTING articles available

in the section(s) you are accessing.

MANUAL TRANSMISSION/TRANSAXLE TROUBLE SHOOTING

Condition Possible Cause

Noisy In Forward Gears .Low gear oil level,

.Loose bell housing bolts,

.Worn bearings or gears

Clunk On Deceleration

(FWD Only) .Loose engine mounts,

.Worn inboard CV joints,

.Worn differential pinion shaft,

.Side gear hub counterbore

in case worn oversize

Gear Clash When Shifting

Forward Gears .Clutch Out Of Adjustment,

.Shift linkage damaged or

out of adjustment,

.Gears or synchronizers damaged,

.Low gear oil level

Transmission Noisy When

Moving (RWD Only) Quiet In

Neutral With Clutch Engaged .Worn rear outputshaft bearing

Gear Rattle .Worn bearings,

.Wrong gear oil,

.Low gear oil,

.Worn gears

Steady Ticking At Idle

(Increases With RPM) .Broken tooth on gear

Gear Clash When Shifting

Forward Gears .Worn or broken synchronizers

Loud Whine In Reverse .Normal condition (1)

Noise When Stepping On Clutch .Bad release bearing,

.Worn pilot bearing

Ticking Or Screeching As

Clutch Is Engaged .Faulty release bearing,

.Uneven pressure plate fingers

Click Or Snap When Clutch

Is Engaged .Worn clutch fork,

.Worn or broken front bearing

retainer

Transmission Shifts Hard .Clutch not releasing,

.Shift mechanism binding,

.Clutch installed backwards

Will Not Shift Into One

Gear, Shifts Into All

Others .Bent shift fork,

.Worn detent balls

Locked Into Gear,

Cannot Shift .Clutch adjustment,

.Worn detent balls

Transmission Jumps Out

Of Gear .Pilot bearing worn,

.Bent shift fork,

.Worn gear teeth or face

.Excessive gear train end play

.Worn synchronizers

.Missing detent ball spring

.Shift mechanism worn or out of

adjustment

.Engine or transmission mount

bolts loose or out of adjustment

.Transmission not aligned

Shift Lever Rattle .Worn shift lever or detents

.Worn shift forks

.Worn synchronizers sleeve

Shift Lever Hops Under

Acceleration .Worn engine or transmission

mounts

(1) - Most units use spur cut gears in reverse and are noisy

POWERTRAIN

CLUTCH TROUBLE SHOOTING

NOTE: This is GENERAL information. This article is not intended

to be specific to any unique situation or individual vehicle

configuration. The purpose of this Trouble Shooting

information is to provide a list of common causes to

problem symptoms. For model-specific Trouble Shooting,

refer to SUBJECT, DIAGNOSTIC, or TESTING articles available

in the section(s) you are accessing.

BASIC CLUTCH TROUBLE SHOOTING CHART