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1989 nissian pickup, Z24I 4 CYL, 133K miles, failed emissions test today, please any suggestions. HIGH Hydrocarbons at IDLE (765 rpm) HC = 320 LIMIT = 200 FAILED results: HIGH RPM HC = 56 LIMIT 200 CO = 0.60 LIMIT 1.20 CO2 = 14.8 O2 = 0.75 LOW RPM HC = 320 LIMIT 200 FAILED CO = 0.78 LIMIT 1.2 CO2 = 15.0 O2 = 0.22 haven?t driven in awhile. today changed plugs, air filter, pcv filter and replaced muffler. truck runs great, no problems at all. good power, idles fine etc. thank you guys |
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