NO.26 EXHAUST SULPHUR SMELL [LF, L3]


26	EXHAUST SULPHUR SMELL
DESCRIPTION	Rotten egg smell (sulphur) from the exhaust
POSSIBLE CAUSE	• Electrical connectors are disconnected or connected improperly • Charcoal canister malfunction • Vacuum lines are disconnected or connected improperly. • Improper fuel pressure • Poor fuel quality • Improper adjustment of the variable resister (Leaded gasoline model) 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 REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE [LF, L3].) (See AFTER REPAIR PROCEDURE [LF, L3].) Caution • Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to the fuel pipe and the quick release connector. Always clean the quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material.


STEP	INSPECTION	RESULTS	ACTION
1	Are any driveability or exhaust smoke concerns present?	Yes	Go to the appropriate flow chart.
1	Are any driveability or exhaust smoke concerns present?	No	Go to the next step.
2	Inspect the following: • Electrical connections • Vacuum lines • Fuel quality • Variable resister adjustment (Leaded gasoline model) (See Leaded Fuel Models) Are all items normal?	Yes	Go to the next step.
2		No	Service if necessary. Repeat Step 2.
3	Connect the WDS or equivalent to DLC-2. Retrieve any continuous memory, KOEO and KOER DTCs. Are any DTCs displayed?	Yes	DTC is displayed: Go to appropriate DTC test.
3		No	No DTC is displayed: Go to the next step.
4	Install a fuel pressure gauge between the fuel pipe and the fuel distributor. Start the engine and run it at idle. Is the fuel line pressure correct at idle? (See FUEL LINE PRESSURE INSPECTION [LF, L3])	Yes	Go to the next step.
4		No	Zero or low: Inspect for a clogged fuel line. If normal, replace the fuel pump unit. High: Replace the fuel pump unit.
5	Inspect the charcoal canister for fuel saturation. Is an excess amount of liquid fuel present in the canister?	Yes	Replace charcoal canister.
5		No	Inspect the fuel tank vent system. If the fuel tank vent system is normal, suggest trying a different brand since the sulfur content can vary in different fuels. If the fuel tank vent system is not normal, repair or replace the malfunctioning parts.
6	Verify the test results. • If normal, return to the diagnostic index to service any additional symptoms. • If the malfunction remains, replace the PCM.