I have a 97 sunfire 2.2. failed emissions with 1032 NOppm.. the limit is 505... I put a tank of high octane gas in with a bottle of product called "guaranteed to pass".. ran test again and.. cont...

Asked by josh_leafs13 May 31, 2011 at 03:43 PM about the 1997 Pontiac Sunfire

Question type: Maintenance & Repair

failed with 656 NOppm.. i checked the EGR and it does move up and down.. i also
sprayed it with carb cleaner..

2 Answers

Jeff answered 13 years ago

Don't use high octane, your compression ratio and timing doesnt require it and your engine will not completely combust it.

Mark helpful

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