NO.26 EXHAUST SULPHUR SMELL [L8, LF]

id0103a0803200

26

EXHAUST SULPHUR SMELL
DESCRIPTION
•  Rotten egg smell (sulphur) from exhaust.
POSSIBLE CAUSE
•  Electrical connectors are disconnected
•  Poor fuel quality
•  Vacuum lines are disconnected or connected improperly
•  Improper fuel pressure
•  Charcoal canister malfunction
•  Fuel tank vent system malfunction
•  PCM malfunction
Warning
The following troubleshooting flow chart contains fuel system diagnosis and repair procedures. Read following warnings before performing fuel system services:
•  Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel.
•  Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete “BEFORE SERVICE PRECAUTION” and “AFTER SERVICE PRECAUTION” described in this manual.
Caution
•  Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material.

Diagnostic procedure

STEP

INSPECTION

RESULTS

ACTION
1
Are any driveability or exhaust smoke concerns present?
Yes
Go to the appropriate symptom troubleshooting.
(See QUICK DIAGNOSTIC CHART [L8, LF].)
No
Go to the next step.
2
Inspect the following:
•  Electrical connections
•  Fuel quality
•  Vacuum lines
Is there any malfunction?
Yes
Repair or replace the malfunctioning part according to the inspection results.
Repeat Step 2.
No
Go to the next step.
3
Connect the M-MDS to the DLC-2.
Perform the KOEO/KOER self test and the DTC Reading Procedure.
(See KOEO/KOER SELF TEST [L8, LF].)
(See ON-BOARD DIAGNOSTIC TEST [L8, LF].)
Are any DTCs present?
Yes
Go to the appropriate DTC inspection.
(See DTC TABLE [L8, LF].)
No
Go to the next step.
4
Install the fuel pressure gauge between fuel pipe and fuel distributor.
Start engine and run it at idle.
Is fuel line pressure correct at idle?
(See FUEL LINE PRESSURE INSPECTION [L8, LF].)
Yes
Go to the next step.
No
Zero or low:
•  Inspect the fuel pump and fuel pump relay related circuit.
•  Inspect for clogged fuel line.
•  If there is no malfunction:
―  Replace the fuel pump unit.
•  If there is a malfunction:
―  Repair or replace the malfunctioning part according to the inspection results.
High:
•  Replace the fuel pump unit.
5
Inspect the charcoal canister for fuel saturation.
(See CHARCOAL CANISTER INSPECTION [L8, LF].)
Is the excess amount of liquid fuel present in canister?
Yes
Replace the charcoal canister.
(See CHARCOAL CANISTER REMOVAL/INSTALLATION [L8, LF].)
No
Inspect the fuel tank vent system.
(See FUEL TANK INSPECTION [L8, LF].)
If the fuel tank vent system is normal:
•  Suggest trying a different brand since sulfur content can vary in different fuels.
If the fuel tank vent system is not normal:
•  Repair or replace the malfunctioning part according to the inspection results.
6
Verify test results.
•  If normal, return to diagnostic index to service any additional symptoms.
•  If malfunction remains, inspect related Service information perform repair or diagnosis.
―  If vehicle repaired, troubleshooting completed.
―  If vehicle not repaired or additional diagnostic information not available, replace the PCM. (See PCM REMOVAL/INSTALLATION [L8, LF].)