1991 MITSUBISHI ECLIPSE steering wheel

ENGINE <1.8L Engine>- Service Adjustment Procedures9-25
MANIFOLD VACUUM INSPECTION(1) Before inspection and adjustment, put the vehicle
in=following state.
l Engine coolant temperature:
85-95°C (185-205°F)
l Lights, electric, cooling fan, and accessories: OFF
lTransaxle: Neutral
(N or P for vehicles with an automa-
tic transaxle)
l Steering wheel: Neutral position
(2) Check that the idling revolution speed is normal.
(3) Remove the PCV hose from the PCV valve and attach a
vacuum gauge.
(4) Check that the negative pressure at the intake manifold
during idle revolution is normal.
Standard value: 510 mmHg (20
in.Hg)(5) If outside the standard value, isolate the cause by referring
to the following table and repair the fault.
SymptomCauseRemedy
l The vacuum gauge reading is less thanl Ignition timing is retarded.l Adjust the ignition timing.
standard value, but the pointer is
-stable.
l The vacuum gauge pointer swingsl Air mixture concentration too
slowly.rich.
l Check ECI-MULTI system.l The vacuum gauge pointer drops irre-
gularly.
l The vacuum gauge pointer drops inter-
mittently to 30 to
160 mmHg (1.2 to
6.3 in.Hg).l The vacuum gauge pointer drops sud-
denly from the normal reading to 250rronnrt$,(9.8 rn.Hg), then returns tol Air mixture concentration too
lean.
l Check ECI-MULTI system.0 Incomplete close contact of in-
take exhaust valve seat.l Check and repair the valve.
l Broken cylinder head gasketl Replace cylinder head gasket.

9-26ENGINE <1.8L Engine> -Service Adjustment Procedures
TIMING BELT TENSION ADJUSTMENTNOSFGBCThere are two access holes provided in the timing belt front
lower cover. The two access holes can be used to readjust thetension of the timing belt, by following the procedures
described below, without the necessity of removing the timing
belt front lower cover. Note, however, that timing belt “B”,
which drives the right silent shaft, cannot be adjusted unless
the cover is removed.
(1) Turn the steering wheel all the way to the left.
(2) Remove the left side undercover panel.
NOTEThis work is done so that the crankshaft can be turned.
(3) Place a piece of wood against the engine oil pan and jack
(4)
:tmove the engine mounting bracket.
(5) Remove the timging belt front upper cover.
(6) Remove the four spark plugs.
(7) Turn the crankshaft clockwise and check the timing belt
condition.
OlAOOBlTiming mark
(on upper under cover)
Timing mark
(on camshaft sprocket)
OlR0153cover
‘I!i
OlA0082
01 A0083(8) Turn the crankshaft clockwise and align the timing marks.
(9) Remove the air conditioner drive belt and the alternator
drive belt.
(10)Remove the access cover (two places). There are easily
removed by inserting a screwdriver into the slots indicated
by the raised arrows in the timing belt cover and twisting.
(1l)lnser-t a socket wrench [a 14 mm (.55 in.) box wrench]
through the hole in the access cover and loosen the timing
belt tension bolt and nut.
Caution
The timing belt tension bolt and nut need only be
loosened
180”-200”. Any further loosening might re-
sult in their falling off inside the timing belt cover.

_-
a--ENGINE
<2.0L DOHC Engine> -Service Adjustment Procedures9-75
JMANIFOLD VACUUM INSPECTION
NO9FNAO(1) Before inspection and adjustment, put the vehicle into the
following state.
l Engine coolant temperature:
85-g5”C (185-205°F)
l Lights, electric, cooling fan, and accessories: OFF
lTransaxle: Neutral (N or
P for vehicles with an automa-
tic transaxle)
l Steering wheel: Neutral position
(2) Check that the idling revolution speed is normal.
(3) Remove the PCV hose from the PCV valve and attach a
vacuum gauge.
(4) Check that the negative pressure at the intake manifold
during idle revolution is normal.
Standard value:: 490
mmHg (19.3 in.Hg): 480
mmHg (18.9 in.Hg)(5) If outside the standard value, isolate the cause by referring
to the following table and repair the fault.
ymptomICause1 Remedy
The vacuum gauge reading is less than
standard value, but the pointer is
stable.
The vacuum gauge pointer swingsslowly.
l Ignition timing is retarded.
l Air mixture concentration too
rich.
l Adjust the ignition timing.
l Check ECI-MULTI system.
The vacuum gauge pointer drops
irre-gularly.l Air mixture concentration too
lean.
l Check ECI-MULTI system.
The vacuum gauge pointer drops inter-mittently to 30 to 160
mmHg (1.2 to
6.3 in.Hg).
The vacuum gauge pointer drops sud-
denly from the normal reading to 250
mmHg (9.8 in.Hg), then returns tonormal.
l Incomplete close contact of in-
take and exhaust valve seat.
l Broken cylinder head gasket
l Check and repair the valve.
l Replace cylinder head gasket.

INTeKE AND EXHAUST - Turbocharger
13. DISCONNECTION OF POWER STEERING OIL PUMP
Disconnect the oil pump with hoses from the bracket.
NOTE
The removed power steering oil pump should be fastened
(by using rope, etc.) in a position that will not interfere with
the removal/installation of the turbocharger assembly.
I05AOO26
29. REMOVAL OF TURBOCHARGER ASSEMBLY
Remove the turbocharger assembly with the exhaust fitting,water
pipe A, water pipe 6 and the oil pipe attached to it.3B.REMOVAL OF OIL PIPE
CautionAfter disconnecting the oil pipe, take care that foreign
material does not enter the oil passage hole of the
turbocharger assembly.
INSPECTIONNllLCAC
TURBOCHARGER ASSEMBLY CHECKl
Visually check the turbine wheel and the compressor wheelfor
cracking or other damage.
lCheck whether the turbine wheel and the compressor wheel
can be easily turned by hand.l
Check for oil leakage from the turbocharger assembly.l
Check whether or not the waste gate valve remains open.
If any problem is found, replace the part after disassembly.
OIL PIPE AND OIL-RETURN PIPE CHECK
Check the oil pipe and oil-return pipe for clogging, bending, or
other damage.
If there is clogging, clean it.
SERVICE POINTS OF INSTALLATIONNllLDAC-x_3SlNSTALLATlON OF OIL PlPE
Supply clean engine oil through the oil pipe installation hole
of the turbocharger assembly.
29. INSTALLATION OF TURBOCHARGER ASSEMBLY
Clean the alignment surfaces shown in the illustration.
Caution
When cleaning, care must be taken so that a piece of the
gasket does not enter the oil passage hole.

FUEL SYSTEM - Service Adjustment Procedures <1.8L Engine>l-4-41
SERVICE ADJUSTMENT PROCEDURES

CURB IDLE SPEED INSPECTION
CautionNlIFiiAE
The improper setting (throttle valve opening) will increase
exhaust gas temperature at deceleration, reducing catalystlife greatly and deteriorating exhaust gas cleaning per-
formance. It also has effect on fuel consumption and
engine braking.
ilter
Paper clip
16A0898
PI-e-conditions for inspection
0Engine coolant temperature: 85-95°C (185-205°F)
0Lights, electric cooling fan and accessories: OFF
l Transaxle: Neutral
(P for vehicles with an automatic
transaxle)l Steering wheel: Neutral position (vehicles with a power
steering)l Check ignition timing and adjust if necessary. Refer to
GROUP 8.
NOTEWith vehicles for Canada, the headlights and taillights, etc.
remain on even when the lighting switch is turned OFF, but thiscauses no problems during inspection.
(1) Insert the paper clip to the connector.
(2) Connect the tachometer to the inserted clip.
(3)Run the engine for more than 5 seconds at an engine speedof 2,000 to 3,000 rpm.
(4) Run the engine at idle for 2 minutes.
(5) Read the idling rpm. If it is not within the specified speed,
check the idle speed control system.
Curb idle speed: 700
f 100 rpm
NOTEAdjustment of the idling speed is usually unnecessary,
because this system controls the idling speed.
IDLE SPEED CONTROL AND
THROTlLE POSI-
TION SENSOR ADJUSTMENT
N14FIATAdjustment conditions
l Engine coolant temperature:
85-95X (185-205°F)
l Lights, electric cooling fan and accessories: Set to OFF
l Transaxle: Neutral (P for vehicles with an automatic
transaxle)l Steering wheel: Neutral position (vehicles with a power
steering)
(1) Slacken the accelerator cable enough.
(2) Connect a tachometer.