air filter MITSUBISHI SPYDER 1990 Service User Guide

E N G I N E ( N O N - T U R B O ) >
INSPECTION PROCEDURE 18
Poor accelerationProbable cause
[Comment]l Malfunction of the ignition systemDefective ignition system, abnormal air-fuel ratio, poor compression pressure, etc. are suspected.lMalfunction of air-fuel ratiol of the fuel supply P o o r a c c e l e r a t i o n
l Clogged exhaust system
SCAN TOOL DTC YES
Are diagnostic trouble codes output
NO
Refer to I N S P E C T I O N C H A R T TROUBLE CODES.
NG Check the injector Carry out procedures 19, 20, in “INSPECTION PROCEDURE
FOR DIAGNOSTIC TROUBLE CODES”. ,
Scan tool: inspection when hesitation, sag, stumble or poor
OK
Check the following items.
l Check the ignition coil, spark plugs, spark plug ca bles.
l Check the compression pressure. . .
l Check the fuel filter or fuel line for clogging.
l Clogged air cleaner
l Clogged exhaust system
INSPECTION PROCEDURE 19
Surge
[Comment]Defective ignition system, abnormal air-fuel are suspected.
Probable cause
l Malfunction of the ignition system
l Malfunction of air-fuel ratio control system
l Malfunction of the EGR solenoid system
SCAN TOOL DTC
YESRefer to INSPECTION CHART FOR DIAGNOSTIC
Are diagnostic trouble codes outputTROUBLE CODES.
NO
Check the injectors for opNG Check the injector control circuit. Carry out proc edures 21,
(Refer to in “INSPECTION PROCEDURE
OK FOR DIAGNOSTIC TROUBLE CODES”.
Scan Tool: Inspection when surge occurs.
(Refer to INSPECTION PROCEDURE 35.)
OK
Check the fuel pressure. (Refer to I
OK
Check the following items.
l Check the ignition coil, spark plugs, spark plug ca bles.
l Check the EGR system.
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ENGINE
6. If is not correct, troubleshoot and repair
to the table
SymptomP r o b a b l e c a u s eRemedy
l Fuel pressure too lowClogged fuel filter Replace fuel filterl No fuel pressure in fuel returnhose
Fuel leaking return side due to poorReplace fuel pressure regulator
fuel regulator valve seating or settled
spring
Low fuel pump delivery pressure
Replace fuel pump
Fuel pressure too highBinding valve in fuel pressure
regulator
fuel .
Clogged fuel return hose or pipeClean or replace or ‘pipe
7. the scan tool, with ‘the position,
the “Fuel System ,
8. Turn the ignition switch off and
‘gauge reading. Normal does
within 2 minutes! it does, observe the rate
and troubleshoot and repair-according table
SymptomProbable cause Remedy
Fuel pressure drops gradually afterLeaky injector Replace injector
engine is stopped Leaky fuel regulator valve seat Replace fuel pressur e regulator
Fuel pressure drops sharply
Checkvalve in fuel pump is held open Replace fuel pu mp
ately after engine is stopped
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9.Remove fuel pressure gauge and reinstall protective cover
onto fuel rail service valve.

ENGINE (TURBO)
AND ENGINE> Troubleshooting
Code No. Excessive to Enter Closed Loop Fuel
Control
[Comment]l Heated oxygen failedBackgroundl Injector failed
l The system reduces exhaust emissions by means of close d-loop fuel control.
l Fuel pressure regulator failedlThe engine control module checks the time taken unt il closed-loop fuel control commences.l Fuel pump failed
Check Areal Fuel filter blocked,
l Engine coolant temperature is higher than l into intake system-
l Intake air temperature is
or higher E x h a u s t - g a s l e a k
l Barometric pressure is 76 (11 psi.) or higher. l
Engine control module l Engine speed is at between about 1800 and 3500 l Volumetric efficiency is 16 62%.
l Running within air/fuel mixture ratio feedback zone .
l Monitoring time: 128
Judgement Criterial fuel injection system doesn’t enter the closed loo p control within about 30 sec.
l Monitored only once per trip.
,
Check the heated oxygen sensor (front). (Refer to Replace
Engine>
NG Repair
OKNGCheck the harness wire between the ECM and the heat ed oxygensensor connector. Repair
OK
Check meInjector. (Refer to P.lNG Replace
OKNG Repair
OKNG Repair
OK
Check the fuel pressure. (Refer to
l Check for air being drawn into me air intake system .lCheck for exhaust gas leaks (oxygen sensor fitting, exhaust
l Check the fuel pump (insufficient discharge).
Replacethe ECM.
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ENGINE (TURBO)
AND ENGINE> Troubleshooting
Code No. Fuel Trim Malfunction (Bank 1)
[Comment]
Background
lIf a malfunction occurs in the fuel system, the fue l compensation value becomes too largeor too small.lThe engine control module checks whether the fuel c ompensation value is within a specified
range.
Check Areal Under the closed loop air-fuel ratio control
l Intake air temperature is or higher
l Barometric pressure is 76 (11 psi.) or higher.
Judgement CriterialLong-range fuel correction has continued to be not lower than or not higher than
-12.5% for 10 sec.
lShort-range fuel correction has continued to be not lower than or not higher than-10.0% for 10 sec.
SCAN TOOL Data list 13 Intake air temperature sensor (Refer to
Probable
l V o l u m e ‘ a i r l Injector failed .Incorrect fuel pressure
Air drawn gaps seals,’ etc.
Heated oxygen sensor
Engine coolant temperature sensor failed, Intake air, temperature sensor f a i l e d Exhaust gas leaks
E n g i n e
NG Check the intake air temperature circuit malfuncti on. (Refer to INSPECTION PROCEDURE TROUBLE CODE
NGSCAN TOOL Data list Check the engine coolant malfunction (Refer
21 Engine coolant temperature sensor (Refer to to INSPECTION PROCEDURE
OKTROUBLE CODE
SCAN TOOL Data list
25 Barometric pressure sensor (Refer to
OK
NG Check the barometric pressure circuit INSPECTION PROCEDURE D I A G N O S T I C
TROUBLE CODE
NGCheck the injector (Refer to Replace
OK N G
Check the following connectors: Repair
NG Repair
OK
Check the fuel pressure (Refer to
OK
SCAN TOOL Data list
Morethan zero Check if air was drawn N G Repair81 Long-term fuel compensation (Refer to l fuel trim more or less than zero?I
sensor(Refer to l Does the tester indi-
cate more than the
standard value?
Yes
Replace the volume airflow sensor.
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lCheck for fuel leakingfrom injectors.lCheck for contamina-
tion (water, kerosene,
etc.) in the fuel.
OK
Replace the ECM
into the intake
OK
SCAN No
12 Volume air flow sensor(Refer to l Does the tester indi-
cate less than the
standard value?
l Check for blockedinjectors.l Check for fuel filter
and fuel line block-
ages.l Check the fuel pump(insufficientdis-charge).l Check for exhaust
gas leaks (oxygen
sensorfitting, exhaust
manifold cracks, front
pipe cracks, etc.)lCheck for contamina-
tion (water, kerosene,
etc.) in the
OK
Replace

ENGINE (TURBO)
AND ENGINE> T r o u b l e s h o o t i n g
INSPECTION PROCEDURE 15
Hesitation, sag or stumbleProbable
[Comment]Malfunction of the ignition system
In cases such as the above, the cause is probably t hat ignition system, air/fuel or l of pressure is defective. of the fuel l Malfunction of the system Poor compression Malfunction of the turbocharger,
Arediagnostic trouble codesoutput
Check the injectors for operationsound.(Refer to
OK
Refer to INSPECTION FOR DIAGNOSTICTROUBLE CODES.. .
Check the injector circuit malfunction PROCEDURE FOR DIAGNOSTIC
Check the ignition timing. Engine (Turbo)>
(Refer to GROUP On-vehicle Service.)
Check the ignition timing.
(Refer to GROUP 11 On-vehicle Service.)
Check that the crankshaft position and cover installed properly.
OK
Scan Tool: Inspection when hesitation, sag, stumble or pooracceleration occurs. (Refer to INSPECTION
PROCEDURE 42.)
IOK
Check the fuel pressure. (Refer to
O K
Check the following items.
l Check the ignition coil, spark plugs, spark plug ca bles.
l Check supercharging pressure.
l Check intake charge pressure control system.
l Check rotating resistance of turbocharger turbine w heel. (Does the wheel rotate smoothly?)
Check the EGR system.l Check the compression pressure.lCheck the fuel filter or fuel line for clogging.
INSPECTION PROCEDURE 16
Acceleration shock
[Comment]
In cases such as the above, the cause is probably t hat there is an ignition leak accompanying
the increase in the spark plug demand voltage durin g acceleration.
Probable cause
M a l f u n c t i o n system
SCAN TOOL DTC
Are diagnostic trouble codes output
NORefer to
INSPECTION CHART FOR DIAGNOSTIC
T R O U B L E C O D E S .
,
Check the following items.
l Check the ignition coil, spark plugs, spark plug ca bles.
l Check for occurrence of ignition leak.
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ENGINE (TURBO)
AND
ENGINE> Troubleshooting
INSPECTION PROCEDURE 17
Probable causeI
[Comment]l Malfunction of the system
Malfunction of the system is suspected.
Are diagnostic trouble codes output
YESRefer to INSPECTION FOR DIAGNOSTICTROUBLE CODES.
Check theidle air control motor for operation sound Engine (Refer to Check the idle air control motor for operation soun d Engine>. (Refer to
SCAN TOOL Data list
14 Throttle position sensor (Refer to
OK
Check the idle control system malfunction (Refer t o INSPECTION PROCEDURE FOR DIAGNOSTIC TROUBLE CODE
Check the throttle position circuit malfunction (Refer to PROCEDURE FOR DIAGNOSTIC TROUBLE 20.)
NG,
SCAN TOOL Data list Check closed position switch system.
26 Closed throttle position switch (Refer to (Refer to INSPECTION PROCEDURE FOR DIAGNOSTICTROUBLE CODE .
. .
Clean the throttle valve area. (Refer to
INSPECTION PROCEDURE 18
Poor acceleration Probable cause I
[Comment]
Defective ignition system, abnormal air-fuel ratio, poor compression pressure, etc. are l Malfunction of the Ignition system Malfunction of air-fuel ratio control l Malfunction of the fuel supply system Poor acceleration
l C l o g g e d e x h a u s t s y s t e m
l Malfunction ‘of turbocharger system .
SCAN TOOL DTC
Are diagnostic trouble codes output
YESRefer to INSPECTION CHART FOR DIAGNOSTICTROUBLE CODES.
Check the injectors for opNG
(Refer to PROCEDURE FOR DIAGNOSTIC TROUBLE
OK
Check the ignition timing. Engine (Turbo)>
(Refer to GROUP A On-vehicle Service.)
Check the ignition timing. Engine>
Check that the crankshaft position sensor and timi ng belt cover are
installed
(Refer to GROUP On-vehicle Service.)
OK
Scan tool: Inspection when hesitation. stumble or poor acceleration occur. (Refer to INSPECTIONPROCEDURE 42.)I
OK
Check the fuel pressure. (Refer to
OK
Check the following items.
l Check the ignition coil, spark plugs, spark plug ca bles.
l Check supercharging pressure.
l Check intake charge pressure control system.
l Check rotating resistance of turbocharger turbine w heel. (Does the wheel rotate smoothly?)
l Check the compression pressure.
lCheck the fuel filter or fuel for clogging.
l Broken air intake hose
Clogged air cleaner
l Clogged exhaust system
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AND On-vehicle
10. Disconnect and plug the vacuum hose from the fuel
sure regulator and measure fuel pressure with the hose
end closed by a finger.
Standard value:
( 4 2 - 4 5 a t c u r b ,
(Turbo)> .
idle
11. Check to see that fuel pressure at idle drop
even after the engine has been raced
12. Racing the engine repeatedly, hold the,, fuel r eturn hose
lightly with fingers to that fuel pressure
i n t h e r e t u r n h o s e .
NOTE
If the fuel flow rate is low, there will be no fuel pressure
in the return hose.
13.
any of fuel pressure measured in steps 9 to 12 is out
of specification, troubleshoot and repair according to the
table below.
Symptom Probable cause Remedy
l Fuel pressure too lowClogged fuel filterReplace fuel filterlFuel pressure drops after racinglNo fuel pressure in fuel returnFuel leaking to return side due toReplace fuel pressure regulator
hose poor fuel regulator valve seating or
settled spiing
Low fuel pump delivery pressure Replace fuel pump
Fuel pressure too high Binding valve in fuel pressure
Replace fuel pressure regulator
lator
Same fuel pressure when vacuum
hose is connected and when
connected Clogged fuel return hose or pipe
Clean or replace hose or pipe
Damaged vacuum hose or clogged Replace vacuum hose or clean
nipple
Malfunction of the fuel pressureChecking the fuel pressure control
control system system

FUEL SUPPLY -‘Fuel Tank
SymptomProbable cause
Engine malfunctions
Bent or kinked fuel pipe or hose Repair or replace
due to insufficient fuelClogged fuel pipe or hoseClean or replace
Clogged fuel filter or in-tank fuel filter
Water in fuel filter
Dirty or rusted fuel tank interior
Replace. .
Replace the fuel filter or clean the fuel
tank and fuel line
Clean or replace
Malfunctioning fuel pump
(Clogged filter in the pump)
Evaporative emission Mispiping of vapor line .
control system mal-
functions Disconnected vapor line piping joint
(When tank filler tube
cap is removed, pres-
Folded, bent, cracked or clogged vapor line
sure releasing noise is
heard)Faulty fuel tank filler tube cap Replace
Correct
CorrectReplace
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FUEL SUPPLY Filter
REMOVAL AND INSTALLATION
Operationl Residual Pressure from High Pressure
Engine (Non-turbo)>
(Refer to GROUP On-vehicle Service.) Engine (Turbo) and Engine>
(Refer to GROUP On-vehicle Service.)
l Removal Engine (Turbo) and Engine>Air Intake Hose Removal Engine (Turbo) and Engine>
Post-installation Operationl Air Intake Hose Installation andl Battery Engine . .
l Pressure Measurement Engine (Non-turbo)>
(Refer to GROUP On-vehicle Service.) (Turbo) and Engine>
(Refer to GROUP Service.)
E n g i n e ( T u r b o ) a n d
29 Mm 22
‘36.27
Engine (Non-turbo)>
29 Nm22
36Nm27
Removal steps
1.Eye bolt2.Gasket3.High-pressure fuel hose connection4.Gasket
5. Fuel main pipe connection
6. Eye bolt
7.Gasket8.Connector9.Gasket10.Pressure regulator11. Fuel filter12. Fuel filter bracket
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ENGINE COOLING On-vehicle Service
Engine (Turbo) and
ON-VEHICLE SERVICE
ENGINE COOLANT LEAK CHECK
1. Confirm that the coolant level is. up to the filter
Install a radiator cap tester and apply 160 (23 psi)
pressure, and then check for leakage from
radiator
hose or connections.
Caution
1. After testing, clean up all coolant seepagefrom
areas of leakage.
2.When the tester is removed, be careful not to spill
any coolant.
3.During tester usage, do not deform the filler neck
of the radiator.
2. If leakage is present, repair or replace the app ropriate
part.
RADIATOR CAP VALVE OPENING
CHECK
1.Use ‘a cap adapter to attach the radiator cap to the tester.
2. Increase the pressure until the indicator of the gauge
stops moving..
Standard value:
E n g i n e ( N o n - t u r b o ) >
9 4 - 1 2 2 p s i )
Engine (Turbo) and
psi)
Limit:
Engine (Turbo) and Engine>
65
(9.2 psi)
3.Replace the radiator cap if the reading does not re main
at or above the limit.
NOTE
Be sure that the radiator cap is clean before testing,
since rust or other foreign material on the radiato r cap
seal may cause an improper reading.
ENGINE COOLANT
Refer to GROUP 00 Maintenance
ENGINE COOLANT CONCENTRATION TEST
1 4 1 0 0 1 1 0 0 8 5
Refer to GROUP 00 Recommended
C a p a c i t i e s T a b l e . ,
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