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04 Toyota 4Runner Smells like Eggs

Tiny
MRMCCLINTOCK
  • MEMBER
  • 2004 TOYOTA 4RUNNER
I have a 2004 Toyota 4Runner Limited. Has 38,000 miles. It is emitting an awful sulfur or rotten egg smell. Especially in stop-n-go traffic or if I run the engine hard, such as a fast acceleration.

Suggestions?
Thursday, April 19th, 2007 AT 8:46 AM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
A rich fuel mixture will often produce a "rotten egg" odor in the exhaust (the smell is hydrogen sulfide). Underlying problems may include an engine management system that is not going into closed loop (check the coolant and oxygen sensors
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Thursday, April 19th, 2007 AT 9:23 AM
Tiny
WALTER5550
  • MEMBER
  • 13 POSTS
Hey there,

Have you checked your battery(ies), it could be that one is on it's way home and dying slowly. When driving the car hard you will overcharge the battery and the heat of the engine might contribute to the production of gases in the battery cell.
Sooner or later the battery won't do the job anymore, if this is the cause.

Good luck
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Friday, December 14th, 2007 AT 9:32 AM

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