On-Vehice Service- Except Evolution: Other Mitsubishi Lancer IX

IGNITION TIMING CHECK

Required Special Tool

MB991502: Scan Tool (MUT-II)

Scheme 387

1. Before inspection, set vehicles to the following conditions: Engine coolant temperature: 80 95°C (176 - 203°F) Lights and all accessories: OFF Transaxle: Neutral (P range on vehicles with A/T) CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.
2. Connect scan tool MB991502 to the data link connector.
3. Set up a timing light.
4. Start the engine and run it at idle.
5. Check that the idle speed is approximately 700 r/min.
6. Select scan tool Mb991502 MFI actuator test "item number 17."
7. Check that basic ignition timing is within the standard value. Standard value: 5° BTDC +/- 3°
8. If the basic ignition timing is not within the standard value, check the following items: Is the MFI system diagnostic trouble code is output Timing belt cover and crankshaft position sensor installation conditions Crankshaft sensing blade condition CAUTION: If the actuator test is not canceled, the forced drive will continue for 27 minutes. Driving in this state could lead to engine failure.
9. Press the clear key on scan tool MB991502 (select forced-drive stop mode), and cancel the actuator test.
10. Check that the actual ignition timing is at the standard value. Standard value: Approximately 8° BTDC NOTE: Ignition timing fluctuates about +/- 7 ° Before Top Dead Center, even under normal operating condition. NOTE: It is automatically further advanced by about 5° to 10° Before Top Dead Center at higher altitudes.

IDLE MIXTURE CHECK

Required Special Tool

MB991502: Scan Tool (MUT-II)

Scheme 388

1. Before inspection, set vehicles to the following conditions: Engine coolant temperature: 80 - 95°C (176 - 203°F) Lights and all accessories: OFF Transaxle: Neutral (P range on vehicles with A/T) CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.
2. Connect scan tool MB991502 to the data link connector.
3. Confirm basic ignition timing is within the standard value. (Refer to «IGNITION TIMING CHECK»(ref-183616-S29784541022005081800000) .) Standard value: 5° BTDC +/-3°
4. Increase engine speed to 2,500 r/min for 2 minutes.
5. Set the CO/HC tester.
6. Check the CO and HC contents at idle. Standard value: CO contents: 0.5 % or less HC contents: 100 ppm or less
7. If the CO and HC contents do not remain inside the standard value, check the following items: If the MFI system diagnostic trouble code is output Closed-loop control (When the closed-loop control is carried out normally, the output signal of the heated oxygen sensor changes between 0 - 400 mV and 600 - 1,000 mV at idle.) Fuel pressure Injector(s) Ignition coil, spark plug cable, spark plug EGR system and EGR valve leak Evaporative emission control system Compression pressure NOTE: Replace the catalytic converter when the CO and HC contents do not remain inside the standard value, even though the result of the inspection is normal for all items.

CURB IDLE SPEED CHECK

Required Special Tool

MB991502: Scan Tool (MUT-II)

Scheme 389

1. Before inspection's set vehicles to the following conditions: Engine coolant temperature: 80 - 95°C (176 - 203°F) Lights and all accessories: OFF Transaxle: Neutral (P range on vehicles with A/T) CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.
2. Connect scan tool MB991502 to the data link connector.
3. Confirm basic ignition timing is within the standard value. (Refer to «IGNITION TIMING CHECK»(ref-183616-S29784541022005081800000) .) Standard value: 5° BTDC +/- 3°
4. Start the engine.
5. Run the engine at idle for 2 minutes.
6. Check the idle speed. Select MFI service data item number 22 and take a reading of the idle speed. Curb idle speed: 700 +/- 100 r/min NOTE: The idle speed is controlled automatically by the idle air control system.
7. If the idle speed is outside the standard value, refer to «SELF-DIAGNOSTICS - EXCEPT 2.0L TURBO»(ref-152075) or «SELF-DIAGNOSTICS - 2.0L TURBO»(ref-159724) articles. .

Scheme 390

1. Before inspection, check that the engine oil, starter and battery are normal. Also, set the vehicle to the following conditions: Engine coolant temperature: 80 - 95°C (176 - 203°F) Lights, and all accessories: OFF Transaxle: Neutral (P range on vehicles with A/T)
2. Disconnect the spark plug cables.
3. Remove all of the spark plugs.
4. Disconnect the crankshaft position sensor connector. NOTE: Doing this will prevent the engine control module from carrying out ignition and fuel injection. WARNING: Keep your distance from the spark plug hole when cranking. Oil, fuel, etc., may spray out from the spark plug hole and may cause serious injury.
5. Cover the spark plug holes with a shop towel etc. Crank the engine for a few seconds to clear debris from a round the spark plug holes. After the engine has been cranked, check for foreign material adhering to the shop towel.
6. Install the compression gauge to one of the spark plug holes.
7. Crank the engine with the throttle valve fully open and measure the compression pressure. Standard value (at engine speed of 200 r/min): 1,618 kPa (234 psi) Minimum limit (at engine speed of 200 r/min): 1,176 kPa (170 psi)
8. Measure the compression pressure for all the cylinders, and check that the pressure differences of the cylinders are below the limit. Limit: 98 kPa (14 psi)
9. If there is a cylinder with compression or a compression difference that is outside the limit, pour a small amount of engine oil through the spark plug hole, and repeat the operations in steps 6 to 8. if the compression increase after oil is added, the cause of the malfunction is a worn or damaged piston ring and/ or cylinder inner surface. If the compression does not rise after oil is added, the cause is a burnt or defective valve seat, or pressure is leaking from the gasket.
10. Connect the crankshaft position sensor connector.
11. Install the spark plugs and spark plug cables.
12. Use the scan tool to erase the diagnostic trouble codes. NOTE: This will erase the diagnostic trouble code resulting from the crankshaft position sensor connector being disconnected. NOTE: If the negative (-) cable has been disconnected from the battery terminal in order to erase the diagnostic trouble code, operate the engine at idle for approximately 10 minutes after restarting.

Scheme 391

1. Before inspection, check that the engine oil, starter and battery are normal. Also, set the vehicle to the following conditions: Engine coolant temperature: 80 - 95°C (176 - 203°F) Lights, and all accessories: OFF Transaxle: Neutral (P range on vehicles with A/T)
2. Connect a tachometer.
3. Attach a tee-fitting union to the vacuum hose between the fuel pressure regulator and the intake manifold plenum, and connect a vacuum gauge.
4. Start the engine ad check that idle speed is within specification. Then check the vacuum gauge reading. Idle speed: 700 +/- 100 r/min Minimum limit: 60 kPa (18 in Hg)

Scheme 392

1. Remove the timing belt upper cover.
2. Turn the crankshaft clockwise to set the No. 1 cylinder to the top dead compression center. CAUTION: As the purpose of this procedure is to apply the proper amount of tension to the timing belt by means of the cam drive torque, be sure not to rotate the crankshaft counterclockwise.
3. Remove the access cover.
4. Loosen the timing belt tensioner fixing bolt to apply tension to the belt by means of the force of the tensioner spring. CAUTION: Loosen the bolt 1/4 to 1/2 turn. If the belt is loosened more than necessary, the bolt may fall inside the cover.
5. Tighten the timing belt tensioner fixing bolt.
6. Install the access cover.
7. Install the timing belt upper cover.

LASH ADJUSTER CHECK

If an abnormal noise (chattering noise) is heard by malfunction of the lash adjuster immediately after starting the engine and does not disappear, it might be the lash adjusters. Perform the following check.

Note. An abnormal noise due to malfunction of the lash adjuster is produced is produced immediately after starting the engine and changes with the engine speed, irrespective of the engine load. If, the abnormal noise is not produced immediately after starting the engine or does not change with the engine speed, or it changes with the engine load, the lash adjuster is not the cause for the abnormal noise.

Note. When the lash adjuster is malfunctioning, the abnormal noise is rarely eliminated by running the engine at idle speed. However, the abnormal noise may disappear only when seizure is caused by oil sludge in the engine whose oil is not maintained properly.

1. Start the engine.
2. Check if the abnormal noise produced immediately after starting the engine changes with the change in the engine speed. If the abnormal noise is not produced immediately after starting the engine or it does not change with the engine speed, the lash adjuster is not the cause for the noise. Therefore, investigate other causes. The abnormal noise is probably caused by some other parts than the engine proper if it does not change with the engine speed. (In this case, the lash adjuster is in good condition.)
3. With the engine idling, change the engine load (shift from N to D range, for example) to make sure that there is no change in the level of abnormal noise. If there is a change in the level of abnormal noise, suspect a tapping noise due to worn crankshaft bearing or connecting rod bearing. (In this case, the lash adjuster is in good condition.)
4. After completion of warm-up, run the engine at idle to check for abnormal noise. If the noise is reduced or disappears, clean the lash adjuster (Refer to «ROCKER ARMS AND CAMSHAFT»(ref-183617-S06450426002005081800000) - Inspection .) It is suspected that the noise is due to collapse of the lash adjuster. If there is no change in the level of the abnormal noise, proceed to step 5.
5. Run the engine to bleed the lash adjuster system.
6. If the abnormal noise does not disappear after air bleeding operation, clean the lash adjuster (Refer to «ROCKER ARMS AND CAMSHAFT»(ref-183617-S06450426002005081800000) - Inspection .)

Bleeding lash adjuster system

Note. Parking the vehicle on a grade for a long time may drain oil from the lash adjuster, causing air to enter the high pressure chamber when starting the engine.

Note. After parking for many hours, oil may drain from the oil passage and take time before oil is supplied to the lash adjuster, causing air to enter the high pressure chamber.

Note. In the above cases, abnormal noise can be eliminated by bleeding the lash adjuster system.

Scheme 393

Scheme 394

Scheme 395

1. Check engine oil. Add or change oil as required. NOTE: If the engine oil level is low, air is sucked from the oil screen, causing air to enter the oil passage. NOTE: If the engine oil level is higher than specification, oil may be stirred by the crankshaft, causing oil to be mixed with air creating aerated (foaming) oil. NOTE: If oil is deteriorated, air is not easily separated from oil, increasing the quantity of air contained in oil. NOTE: If air mixed with oil enters the high pressure chamber inside the lash adjuster from the above causes, air in the high pressure chamber is compressed excessively while the valve is being opened, resulting in an abnormal noise when the valve closes. This is the same phenomenon as that observed when the valve clearance has become excessive. The lash adjuster can resume normal function when air entered the lash adjuster is removed.
2. Idle the engine for one to three minutes to warm it up.
3. Repeat the operation pattern, shown in left figure, at no load to check for abnormal noise. (Usually the abnormal noise is eliminated after repetition of the operation 10 to 30 times. If, however, no change is observed in the level of abnormal noise after repeating the operation more than 30 times, suspect, that the abnormal noise is due to some other factors.)
4. After elimination of abnormal noise, repeat the operation shown in left figure five more times.
5. Run the engine at idle for one to three minutes to make sure that the abnormal noise has been eliminated.