1991 MITSUBISHI 3000GT air condition

13-140FUEL SYSTEM - On-vehicle Inspection of MPI Components
(14)Stop the engine and check for a change of the value
indicated by the fuel pressure gauge. The condition is
normal if there is no decrease of the indicated value within~
two minutes.
,If there is a decrease of the indicated value, monitor the
:d ’speed of the decrease, and, referring to the table below,
determine the cause of the problem and make the
appropriate repair.
Condition
After the engine is stopped, thefuel pressure drops gradually.Probable cause
Injector leakage.
Leakage at the fuel pressure
regulator valve seat.Remedy
Replace the injector.
Replace the fuel pressure regulator.
There is a sudden sharp drop of
the fuel pressure immediately
after the engine is stopped.The check valve (within the fuelpump) is not closed.Replace the fuel pump.
(15)Remove all remaining pressure from inside the fuel pipe.(16)Disconnect the fuel pressure gauge and the special tool
from the delivery pipe.
CautionBecause there will be.a slight amount of remaining
pressure in the fuel pipe line, use rags to cover so thatfuel doesn’t splatter.
(17)Replace the O-ring at the end of the fuel high-pressure hose
with a new one.(I 8)After connecting the fuel high-pressure hose to the delivery
pipe, tighten the installation bolt at the specified torque.
dTightening torque: 5.0 Nm (3.6 ftlbs.)
(19)Check to be sure that there is no fuel leakage.@ Apply battery voltage to the terminal for activation of
the fuel pump so as to activate the fuel pump.@ With fuel pressure applied, check for leakage of the fuel
line.
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FUEL SYSTEM - Fuel Tank13-147
Rubber hose
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03FOOl
9
OSFOOB
05FOO7SERVICE POINT OF REMOVAL
MlBGBAK
12. DISCONNECTION OF HIGH PRESSURE FUEL HOSEDisconnect the hose from body main pipe first and then
from fuel pump.
Caution
Cover the hose connection with rags to prevent splash
of fuel that could be caused by some residual pressurein the fuel pipe line.
INSPECTION
MlBGCAMl Check the hoses and the pipes for crack or damage.
l Check the fuel tank cap for malfunction.
l Check the fuel tank for deformation, corrosion or crack.
l Check the fuel tank for dust or foreign material.
NOTEIf the inside of the fuel tank is to be cleaned, use any one of
the following:
(1) Kerosene
(2) Trichloroethylene
(3) A neutral emulsion type detergent
OVERFILL LIMITER (TWO-WAY VALVE)Connect a clean rubber hose to the overfill limiter and check for
operation.
Inspection procedureLightly blow from the inlet
(fuel tank) sideNormal conditionAir passes through after a
slight resistanceLightly blow from the outletAir passes through
(canister) sideISERVICE POINTS OF INSTALLATION
MlSGDAT19. INSTALLATION OF FUEL PUMP AND FUEL GAUGE
UNIT ASSEMBLY
Align the three positioning projections of the packing with
the holes in the fuel pump and fuel gauge unit assembly.
TSB Revision18.13. IO. 7. CONNECTION OF VAPOR HOSE
(1) If the pipe has a stepped part, connect the vapor hose
to the pipe securely, up to the stepped part, as shown in
the illustration.
(2) If the pipe does not have a stepped part, connect the
vapor hose to the pipe securely, so that it is the
standard value.
Standard value: 25
- 30 mm (1.0 - I.2 in.)

13-150FUEL SYSTEMFuel Pump and Fuel Gauge Unit Assembly- and Overfill Limiter (Two-Way Valve)
Rubber hose
9Flare nut
Secure side
03Yo43Camst
ide
DO304INSPECTION
MlBUCAB
OVERFILL LIMITER (TWO-WAY VALVE)~
Connect a clean rubber hose to the overfill limiter and check for
operation.
‘d
Inspection procedureNormal conditionLightly blow from the inlet
(fuel tank) sideAir passes through after a
slight resistanceLightly blow from the outlet
(canister) sideAir passes through
SERVICE POINTS OF INSTALLATION
M13UDAC6. INSTALLATION OF FUEL PUMP AND FUEL GAUGE
UNIT ASSEMBLY
Align the three positioning projections of the packing with
the holes in the fuel pump and fuel gauge unit assembly.
5. 4. CONNECTION OF HIGH PRESSURE FUEL HOSE
Temporarily tighten the flare nut by hand, and then tighten it
to the specified torque, being careful that the high pressure
fuel hose does not become twisted.
CautionWhen tightening flare nut, be careful not to bend or
[J’twist line to prevent fuel pump from damage.\3. INSTALLATION OF OVERFILL LIMITER (TWO-WAY
VALVE)Install so that the overfill limiter is facing in the direction
shown in the illustration.
1. INSTALLATION OF FUEL GAUGE COVER
Before installing the fuel gauge cover, apply the specified
sealant to the rear floor pan.
Specified sealant: 3M ATD Part No. 8509 or equivalent
1 TSB RevisionIII

13-156ENGINE CONTROL - Service Adjustment Procedures
SERVICE ADJUSTMENT PROCEDURES
M13FBCKIACCELERATOR CABLE INSPECTION AND
a ’ADJUSTMENT
For models equipped with the cruise control system, refer to
P. 13-l 58.(1) Turn air conditioner and lights OFF.
Inspect and adjust at no load.
(2) Warm engine until stabilized at idle.
(3) Confirm idle speed is at prescribed rpm.
(4) Stop engine (ignition switch OFF).
(5) Confirm there are no sharp bends in accelerator cable.
(6) Check inner cable for correct slack.
(7) If there is too ‘much slack or no slack, adjust play by the
following procedures.@ Turn the ignition switch to the ON position (without
starting the engine) and leave in that condition for
approximately 15 seconds.@Loosen the adjusting bolts on the air intake plenum, and
then secure the outer cable so that the free play of
th,einner cable will be the standard value.
Standard value:
1 - 2 mm (.04 - .08 in.)3-5 mm
(.12-.20 in.)
NOTE
\JIf there is excessive play of the accelerator cable, the
vehicle speed drop (“undershoot”) when climbing a slope
will be large.
If there is no play (excessive tension) of the accelerator
cable, the idling speed will increase.
(8) After adjusting, confirm that throttle valve fully opens and
closes by operating pedal.
(9) Adjust accelerator cable play and confirm throttle lever
stopper touches the fixed SAS.
ACCELERATOR SWITCH INSPECTION AND
A
nADJUSTMENTMlBFlBC
09FO117Make sure that when the accelerator pedal is free, there is
;$ustingcontinuity between the terminals of the accelerator switch and
/that when the pedal is pressed until the indicated pedal stroke
A reaches the standard value, there is no continuity between
the terminals of the switch.
Standard value:Accelerator switch switching point
2 - 6 mm (.079 - .24 in.)If stroke A is out of specification, adjust with adjusting bolt.
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13-I 78CRUISE CONTROL SYSTEM - Service Adjustment ProceduresSERVICE
ADJUSTMENT PROCEDURESCRUISE CONTROL CABLES INSPECTION AND ADJUSTMENT
I
MlSFTCA
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Cruise control actuator
Cruise control assemblyAdjusting nut A
Link B
.
Adillstinn nr~+ R\Cruise control
cable
Adjusting nut C
Accelerator cable
Throttle valve-Link A
07N0004(1) Set the air conditioner, lights and other switches to OFF for
inspection at no load.
(2) Let the engine warm up until it runs at idle.
(3) Check that the idle speed is within the specified range.
(4) Stop the engine and set the ignition switch to OFF.
(5) Check that the accelerator cable, cruise control cable and
throttle cable are routed without sharp bends.
(6) Depress the accelerator pedal to check that the throttle
lever moves smoothly from the fully-closed to fully-opened
position.
(7) Check the free travel state of the inner cables of the
accelerator cable, cruise control cable and throttle cable.
(8) If the inner cables are too loose or have no free travel at all,
check using the following procedure.@ Remove the’ link protector.
@ Loosen the adjusting and lock nuts of the throttle lever
and intermediate links A, B and C to place the throttle
lever and intermediate links A, B and C in the free state.
1 TSB Revision

14-2COOLING - SDecifications
SPECIFICATIONSGENERAL SPECIFICATIONSMMCA..
Items
Cooling method
Radiator
Type
Radiator fan motor
Type
Water pump
Type
Thermostat
Type
Identification markSpecifications
Water-cooled, pressurized, forced circulationwith electrical fan
Pressurized corrugated fin type
Direct current ferrite type
Centrifugal impeller type
Wax type with jiggle valve
76.5 (Stamped on flange)
dSERVICE SPECIFICATIONS
Items
Standard valueSpecifications
Range of coolant antifreeze concentration%30-60
Thermostat
Valve opening temperature of thermostat
“C (“F)
Full-opening temperature of thermostat“C (“F)
Opening pressure of cap high pressure valvekPa (psi)
Therm0 sensor (on radiator) operating temperature

OFF-t ON“C (“F)
ON -+ OFF“C (“F) condenser fan-Vehicles with air conditioner>
OFF-ON“C (“F)
ON + OFF“C (“F)
Limit
76.5 (170)
90
(I 94) or more
75-105(11-15)81-89
(178- 192)77(171)orless
91-99
(196-210.)
87 (189) or less
Opening pressure cap high pressure valve
kPa (psi)65 (9.2)LUBRICANT
MlQCD- -
ItemSpecified lubricantQuantity
Engine coolantlit. (qts.)High quality ethylene glycol8.0 (8.5).
antifreeze coolant
‘d
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COOLING - Specifications / Troubleshooting
SEALANT AND ADHESIVE14-3
MMCE- -
/
id
ItemsSpecified sealants and adhesive/
Engine coolant temperature gauge unit
Engine coolant temperature sensor (Engine control)
Engine coolant temperature sensor (Air conditioner)3M Nut Locking Part No. 4171
TROUBLESHOOTING
L
MllEAAL
Symptom
OverheatProbable cause
Insufficient engine coolant
Too high an anti-freeze concentration
Inoperative electric cooling fan
Faulty thermosensor
Faulty electrical motor
Faulty radiator fan relayRemedy
Replenish
Correct anti-freeze concentration
Replace
Damaged or blocked (insufficiently ventilated)
radiator finsCorrect
Water leaks
Damaged radiator core joint
Corroded or cracked hoses
(radiator hose, heater hose, etc.)
Faulty cap valve or setting of spring
Cracked thermostat housing
Loose water pump mounting bolt or leaking
gasket
Replace
Loose bolt or leaking gasket in water outlet
I
Correct or replacefitting
Loose bolt or leaking gasket in water inletfitting
Loose thermostat housing bolts or leakingfrom gasket
Retorque bolts or replace gasket
Faulty automatic transaxle oil cooler operation
Blocked or collapsed hose and pipeReplace
Loose hose and pipe connectionCorrect
Faulty thermostat operationReplace
Faulty water pump operationReplace
Water passage clogged with slime or rust depositClean
or foreign substance
No rise in temperature
Faulty thermostatReplace
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COOLING - Troubleshootina14-5
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L-
AIR CONDITIONER
COMPRESSOR LOCK
CONTROLLERRADIATOR
FAN MOTOR
RELAYCLO)
A-36
A-45
@!A
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