NO.19 EXHAUST SMOKE [13B-MSP]

19	EXHAUST SMOKE
DESCRIPTION	Blue, black, or white smoke from the exhaust system.
POSSIBLE CAUSE	Pale smoke from tailpipe (Engine oil is being burned) • Oil leakage from oil seal into combustion chamber ― Oil seal • Engine oil entering combustion chamber through intake port ― Oil reaching intake-air system • Increase in oil pan internal pressure • Excessive engine oil • Excessive engine oil supply to combustion chamber through oil discharge hole (metering oil pump malfunction) ― Metering oil tube internal pressure is high (exceeds oil nozzle valve opening pressure) • Metering oil pump malfunction (stuck plunger, internal circuit disabled) • Metering oil pump circuit malfunction (open/short circuits) • Oil pressure sensor malfunction (improper characteristics, internal circuit disabled) • Oil pressure sensor circuit malfunction (open/short circuits) • OCV malfunction (stuck open, not operating smoothly) • OCV circuit malfunction (short circuit) • Metering oil pump drive voltage is low • OCV drive voltage is low ― Oil nozzle valve opening pressure is low • Oil nozzle malfunction (spring force low, foreign material trapped) White smoke from tailpipe (engine coolant leakage into combustion chamber) • Cooling system malfunction ― Engine coolant leakage inside engine Black smoke from tailpipe (concentrated fuel) • Air cleaner clogging • Intake-air system clogging or perforation • Fuel pressure is high • Engine compression pressure is low ― Engine oil (soiling or improper amount/viscosity/type) ― Oil pressure is low ― Fuel pressure is high • Pressure regulator malfunction ― Air penetrating into oil passages ― Metering oil pump malfunction • Oil pipe clogging or perforation • Oil nozzle clogging • Fuel injector (leakage) • Ignition system malfunction Warning • The following diagnostic procedure includes fuel system related servicing. Always make sure to follow the warnings for each procedure when inspecting or repairing the fuel system. ― Fuel vapor is hazardous. It can very easily ignite and cause serious injury or death, and damage to equipment. Always keep sparks and flames away from fuel. ― Fuel line spills and leakage from the pressurized fuel system are dangerous. Fuel can ignite and cause serious injury or death, and damage to equipment. Fuel can also irritate skin and eyes. To prevent this, always execute the “Fuel Line Inspection”. (See BEFORE SERVICE PRECAUTION [13B-MSP].) ― Fuel is highly flammable and dangerous. Fuel line spills and leakage can cause serious injury or death, and damage to equipment. Always refer to the “Quick Release Connector Removal/Installation” before performing the fuel pump unit installation, and execute the “Fuel Leakage Inspection After Fuel Pump Unit Installation” after installation. (See QUICK RELEASE CONNECTOR REMOVAL/INSTALLATION [13B-MSP].) (See AFTER SERVICE PRECAUTION [13B-MSP].) Caution • Foreign material on the connecting area of the quick release connector might cause damage to the connector or fuel pipe. To prevent this, clean the connecting area before disconnecting/connecting the connector.

EXHAUST SMOKE

DESCRIPTION

Blue, black, or white smoke from the exhaust system.

POSSIBLE CAUSE

Pale smoke from tailpipe (Engine oil is being burned)

• Oil leakage from oil seal into combustion chamber

― Oil seal

• Engine oil entering combustion chamber through intake port

― Oil reaching intake-air system

• Increase in oil pan internal pressure

• Excessive engine oil

• Excessive engine oil supply to combustion chamber through oil discharge hole (metering oil pump malfunction)

― Metering oil tube internal pressure is high (exceeds oil nozzle valve opening pressure)

• Metering oil pump malfunction (stuck plunger, internal circuit disabled)

• Metering oil pump circuit malfunction (open/short circuits)

• Oil pressure sensor malfunction (improper characteristics, internal circuit disabled)

• Oil pressure sensor circuit malfunction (open/short circuits)

• OCV malfunction (stuck open, not operating smoothly)

• OCV circuit malfunction (short circuit)

• Metering oil pump drive voltage is low

• OCV drive voltage is low

― Oil nozzle valve opening pressure is low

• Oil nozzle malfunction (spring force low, foreign material trapped)

White smoke from tailpipe (engine coolant leakage into combustion chamber)

• Cooling system malfunction

― Engine coolant leakage inside engine

Black smoke from tailpipe (concentrated fuel)

• Air cleaner clogging

• Intake-air system clogging or perforation

• Fuel pressure is high

• Engine compression pressure is low

― Engine oil (soiling or improper amount/viscosity/type)

― Oil pressure is low

― Fuel pressure is high

• Pressure regulator malfunction

― Air penetrating into oil passages

― Metering oil pump malfunction

• Oil pipe clogging or perforation

• Oil nozzle clogging

• Fuel injector (leakage)

• Ignition system malfunction

Warning

• The following diagnostic procedure includes fuel system related servicing. Always make sure to follow the warnings for each procedure when inspecting or repairing the fuel system.

― Fuel vapor is hazardous. It can very easily ignite and cause serious injury or death, and damage to equipment. Always keep sparks and flames away from fuel.

― Fuel line spills and leakage from the pressurized fuel system are dangerous. Fuel can ignite and cause serious injury or death, and damage to equipment. Fuel can also irritate skin and eyes. To prevent this, always execute the “Fuel Line Inspection”. (See BEFORE SERVICE PRECAUTION [13B-MSP].)

― Fuel is highly flammable and dangerous. Fuel line spills and leakage can cause serious injury or death, and damage to equipment. Always refer to the “Quick Release Connector Removal/Installation” before performing the fuel pump unit installation, and execute the “Fuel Leakage Inspection After Fuel Pump Unit Installation” after installation. (See QUICK RELEASE CONNECTOR REMOVAL/INSTALLATION [13B-MSP].) (See AFTER SERVICE PRECAUTION [13B-MSP].)

Caution

• Foreign material on the connecting area of the quick release connector might cause damage to the connector or fuel pipe. To prevent this, clean the connecting area before disconnecting/connecting the connector.

Step	Inspection	Results	Action
1	Verify the color of the exhaust gas.	Pale	Go to the next step.
White	Go to Step 9.
Black	Go to Step 10.
2	Verify DTCs using the M-MDS. (See DTC TABLE [13B-MSP].) Are any of the following DTCs displayed? • P0552, P0523, P1680, P1681, P1682, P1683, P1684, P1685, P1686, P1687	Yes	Go to the applicable DTC inspection. (See DTC TABLE [13B-MSP].)
No	Go to the next step.
3	Verify if oil is reaching the following intake-air system related parts. • Between the air intake hose and the ventilation hose. • Between the oil filler pipe and the intake manifold. Is oil present?	Yes	Verify the oil level. • If the dipstick indicates H or more, adjust the oil level to H or less. • If the dipstick indicates H or less, the vehicle may have been repeatedly cornered or operated in a similar manner which exposed it to high G-forces (0.9 G or more).
No	Go to the next step.
4	Verify the battery positive voltage. Is the battery positive voltage 10 V or more?	Yes	Go to the next step.
No	Inspect the battery. (See BATTERY INSPECTION [13B-MSP].)
5	Verify the monitor item MOP_ACT using the M-MDS. Verify the value of the monitored item MOP_P_ACT when the ignition switch is turned to the ON position. Is the monitor value between -35 kPa {-0.36 kgf/cm², -5.1 psi} and 35 kPa {0.36 kgf/cm², 5.1psi}?	Yes	Go to the next step.
No	Replace the oil pressure sensor. (See OIL PRESSURE SENSOR REMOVAL/INSTALLATION [13B-MSP].)
6	Start the engine and warm it up. Verify the monitor item MOP_P_ACT using the M-MDS. Verify the value of the monitor item MOP_P_ACT when racing the engine at 2,000 rpm. Is the monitor value 180 kPa {1.84 kgf/cm², 26.1 psi} or more?	Yes	Inspect the OCV, and repair or replace the malfunctioning location. (See OIL CONTROL VALVE (OCV) INSPECTION [13B-MSP].) (See OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [13B-MSP].)
No	Go to the next step.
7	Perform the metering oil pump operation inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [13B-MSP].) Is the metering oil pump system operation normal?	Yes	Go to the next step.
No	Repair or replace the malfunctioning location.
8	Inspect the oil nozzle. (See METERING OIL PUMP INSPECTION [13B-MSP].) Is the oil nozzle normal?	Yes	Verify that there is no oil leakage from the oil seal into the combustion chamber.
No	Replace the oil nozzle. (See OIL NOZZLE REMOVAL/INSTALLATION [13B-MSP].)
9	Does cooling system hold the coolant pressure?	Yes	Inspect and repair the following: • Engine coolant leakage from gasket. • Engine coolant leakage from intake manifold gasket. • Engine coolant leakage due to damaged or improper rotor housing If there is other driveability-related malfunction, perform the applicable diagnostic procedure.
No	Repair or replace the malfunctioning location.
10	Inspect the intake-air system for the following: • Air cleaner clogging • Intake-air system part clogging or perforation Is the intake-air system normal?	Yes	Go to the next step.
No	Repair or replace the malfunctioning location. After repair, go to the next step.
11	Perform a KOER self-test using the M-MDS. (See KOEO/KOER SELF TEST [13B-MSP].) Are any DTCs output?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [13B-MSP].)
No	Go to the next step.
12	Measure the fuel pressure. (See FUEL LINE PRESSURE INSPECTION [13B-MSP].) Is the fuel pressure normal?	Yes	Go to the next step.
No	Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [13B-MSP].)
13	Inspect the compression pressure. (See COMPRESSION INSPECTION [13B-MSP].) Is the compression pressure normal?	Yes	Go to Step 18.
No	Go to the next step.
14	Perform the metering oil pump operation inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [13B-MSP].) Is the metering oil pump system operation normal?	Yes	Go to the next step.
No	Repair or replace the malfunctioning location.
15	Inspect the engine oil condition (viscosity, odor). Is the engine oil thinned, or is there an abnormal fuel odor?	Yes	Replace the engine oil. After that overhaul or replace the engine.
No	Go to the next step.
16	Inspect the oil pressure. (See OIL PRESSURE INSPECTION [13B-MSP].) Is the oil pressure normal?	Yes	Go to the next step.
No	Repair or replace the malfunctioning location. Then, repair the engine.
17	Inspect the oil pump between the metering oil pump and oil nozzle. Is there air suction or clogging inside the oil pump?	Yes	Inspect the oil passage for leakage and clogging. If any, repair or replace the malfunctioning location. Then, repair the engine.
No	Repair the engine.
18	Does the following occur when cranking the engine? (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [13B-MSP].) • Blue sparks can be seen from each high-tension lead disconnected from the spark plug.	Yes	Inspect the spark plug and eccentric shaft position sensor.
No	Inspect the following: • High-tension lead (See HIGH-TENSION LEAD INSPECTION [13B-MSP].) • Ignition coil (See IGNITION COIL INSPECTION [13B-MSP].) • Ignition coil connector

Step

Inspection

Results

Action

Verify the color of the exhaust gas.

Pale

Go to the next step.

White

Go to Step 9.

Black

Go to Step 10.

Verify DTCs using the M-MDS.

(See DTC TABLE [13B-MSP].)

Are any of the following DTCs displayed?

• P0552, P0523, P1680, P1681, P1682, P1683, P1684, P1685, P1686, P1687

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [13B-MSP].)

Go to the next step.

Verify if oil is reaching the following intake-air system related parts.

• Between the air intake hose and the ventilation hose.

• Between the oil filler pipe and the intake manifold.

Is oil present?

Yes

Verify the oil level.

• If the dipstick indicates H or more, adjust the oil level to H or less.

• If the dipstick indicates H or less, the vehicle may have been repeatedly cornered or operated in a similar manner which exposed it to high G-forces (0.9 G or more).

Go to the next step.

Verify the battery positive voltage.

Is the battery positive voltage 10 V or more?

Yes

Go to the next step.

Inspect the battery.

(See BATTERY INSPECTION [13B-MSP].)

Verify the monitor item MOP_ACT using the M-MDS.

Verify the value of the monitored item MOP_P_ACT when the ignition switch is turned to the ON position.

Is the monitor value between -35 kPa {-0.36 kgf/cm², -5.1 psi} and 35 kPa {0.36 kgf/cm², 5.1psi}?

Yes

Go to the next step.

Replace the oil pressure sensor.

(See OIL PRESSURE SENSOR REMOVAL/INSTALLATION [13B-MSP].)

Start the engine and warm it up.

Verify the monitor item MOP_P_ACT using the M-MDS.

Verify the value of the monitor item MOP_P_ACT when racing the engine at 2,000 rpm.

Is the monitor value 180 kPa {1.84 kgf/cm², 26.1 psi} or more?

Yes

Inspect the OCV, and repair or replace the malfunctioning location.

(See OIL CONTROL VALVE (OCV) INSPECTION [13B-MSP].)

(See OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [13B-MSP].)

Go to the next step.

Perform the metering oil pump operation inspection.

(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [13B-MSP].)

Is the metering oil pump system operation normal?

Yes

Go to the next step.

Repair or replace the malfunctioning location.

Inspect the oil nozzle.

(See METERING OIL PUMP INSPECTION [13B-MSP].)

Is the oil nozzle normal?

Yes

Verify that there is no oil leakage from the oil seal into the combustion chamber.

Replace the oil nozzle.

(See OIL NOZZLE REMOVAL/INSTALLATION [13B-MSP].)

Does cooling system hold the coolant pressure?

Yes

Inspect and repair the following:

• Engine coolant leakage from gasket.

• Engine coolant leakage from intake manifold gasket.

• Engine coolant leakage due to damaged or improper rotor housing

If there is other driveability-related malfunction, perform the applicable diagnostic procedure.

Repair or replace the malfunctioning location.

Inspect the intake-air system for the following:

• Air cleaner clogging

• Intake-air system part clogging or perforation

Is the intake-air system normal?

Yes

Go to the next step.

Repair or replace the malfunctioning location.

After repair, go to the next step.

Perform a KOER self-test using the M-MDS.

(See KOEO/KOER SELF TEST [13B-MSP].)

Are any DTCs output?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [13B-MSP].)

Go to the next step.

Measure the fuel pressure.

(See FUEL LINE PRESSURE INSPECTION [13B-MSP].)

Is the fuel pressure normal?

Yes

Go to the next step.

Replace the fuel pump unit.

(See FUEL PUMP UNIT REMOVAL/INSTALLATION [13B-MSP].)

Inspect the compression pressure.

(See COMPRESSION INSPECTION [13B-MSP].)

Is the compression pressure normal?

Yes

Go to Step 18.

Go to the next step.

Perform the metering oil pump operation inspection.

(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [13B-MSP].)

Is the metering oil pump system operation normal?

Yes

Go to the next step.

Repair or replace the malfunctioning location.

Inspect the engine oil condition (viscosity, odor).

Is the engine oil thinned, or is there an abnormal fuel odor?

Yes

Replace the engine oil.

After that overhaul or replace the engine.

Go to the next step.

Inspect the oil pressure.

(See OIL PRESSURE INSPECTION [13B-MSP].)

Is the oil pressure normal?

Yes

Go to the next step.

Repair or replace the malfunctioning location.

Then, repair the engine.

Inspect the oil pump between the metering oil pump and oil nozzle.

Is there air suction or clogging inside the oil pump?

Yes

Inspect the oil passage for leakage and clogging. If any, repair or replace the malfunctioning location.

Then, repair the engine.

Repair the engine.

Does the following occur when cranking the engine?

(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [13B-MSP].)

• Blue sparks can be seen from each high-tension lead disconnected from the spark plug.

Yes

Inspect the spark plug and eccentric shaft position sensor.

Inspect the following:

• High-tension lead

(See HIGH-TENSION LEAD INSPECTION [13B-MSP].)

• Ignition coil

(See IGNITION COIL INSPECTION [13B-MSP].)

• Ignition coil connector