1993 Mazda MPV 93 mpv failed smog

1993 MAZDA MPV
116,000 MILES • 6 CYL • 2WD • AUTOMATIC
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RVCAZARES
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  • 1 POST
I have a 1993 mazda mpv that faid smog dut to high NO 578ppm atv15mph a nd 549 at 25mph everything else passed,Any ideas
Oct 16, 2008 at 3:05 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Have your EGR valve checked thru thoroughly-its job is to reduce combustion temperature to lower the oxides of nitrogen
Oct 16, 2008 at 3:14 PM
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