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help with P0420

  #1  
Old 11-11-2018, 07:54 PM
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Default help with P0420

Hello all, I have a question. I have been watching videos on using spark plug non foulers to fool CPU into thinking all is ok with cats. Is there any long term damage being done to motor by installing these non foulers. Thanks for any help.
 
  #2  
Old 11-12-2018, 10:23 PM
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Posts: 11,308
Default

No.

Just make sure the engines air/fuel ratio is not so off it damaged the CAT.
 
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