02-27-2010, 12:49 AM
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#3 |
 Toyota Racing Development Join Date: Apr 2007
Posts: 5,038
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EGR will cause high NOx, I don't think it's suspect here.
HC and CO are both due to running excessively rich. I would start with checking for diagnostic error codes, then check plugs, air filter and timing... then we'll move on to bigger things. Check codes: http://www.cygnusx1.net/Supra/TechTi...ror_codes.aspx Look in the MKIII FAQ for info on setting timing; You probably don't need to worry about the mechanical timing, just the spark advance.
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