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Engine running rough and shell like rotten eggs

Tiny
ANONYMOUS
  • MEMBER
  • 2006 CADILLAC SRX
  • 100,000 MILES
Engine running rough and shell like rotten eggs
Saturday, February 23rd, 2013 AT 8:36 PM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You have a missfire in the motor and raw fuel is contaminating the cat converter. Get it checked out before you damage the cat and require replacing it.

Roy
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Saturday, February 23rd, 2013 AT 8:41 PM
Tiny
DAVIDJESSUP1
  • MEMBER
  • 1 POST
I have a 2004 srx with the same problem I've scan the code and got p301 also I know that that mean misfire cylinder 1 I've tested the all coils and found cylinder 3 open what do I do next I don't want to was money on this I have also replaced both down stream o2 senors about two months ago
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Saturday, July 1st, 2017 AT 5:33 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
Hello,

Yep this is not a o2 sensor problem at all. Replace the open coil which will cause the problem. When a cylinder misfires it causes the system to go lean which the computer will richen up causing the rotten egg smell.

Please let us know what happens

Cheers, Ken
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Monday, July 3rd, 2017 AT 1:48 PM

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