1989 Mazda B2200 Smog problems and loss of power

Tiny
KTHONGRAK
  • MEMBER
  • 1989 MAZDA B2200
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 70,000 MILES
Hello there. I have a 89 mazda b2200. Its carb. I have a issue with smog. I pre tested it and it has hi knocks. I adjusted the timing and tested the EGR valve and they both are good. I dont know what to check next. I also have a power problem. It is really slugish. It barely goes 65 mph on the freeway. Plz any advise will help

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Wednesday, September 17th, 2008 AT 12:25 AM

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Tiny
2CEXPT
  • MEMBER
High NOx ( Oxides of Nitrogen )

NOX failures are usually EGR-related, since the EGR system is primarily responsible for reducing oxides of nitrogen. But NOX emissions can also be caused by a bad three-way converter or a computer control system that remains in open loop.
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Wednesday, September 17th, 2008 AT 12:43 AM

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