1989 Mazda b2200 Smog problems and loss of power

1989 MAZDA B2200
70,000 MILES • 4 CYL • 2WD • AUTOMATIC
Avatar
KTHONGRAK
  • MEMBER
  • 1 POST
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

Thank You
Sep 17, 2008 at 12:25 AM
Advertisement
Avatar
RASMATAZ
  • CERTIFIED EXPERT
  • 75,992 POSTS
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.
Sep 17, 2008 at 12:43 AM