1999 Chevrolet K1500 "hc ppm failed emission test" Questions

...HC (ppm) , Cruise Emissions 281 HC (ppm) FAILED. Idle limit 220 HC (ppm), Idle emissions 819 HC (ppm). Runs good , but has hesitation when first acceleration like worn timing chain and gears. and boy ...

...HC(PPM) MAX 61/ AVE 27 - MEAS 105 / CO(%)MAX 0.51/AVE 0.10 /MEAS0.91 / NO(PPM) MAX 490 / AVE. 165 / MEAS 292 RESULTS FAILED 25MPH /RPM 1911 / %CO2 MEAS 14.2 / %O2 MEAS 0.0 / HC(PPM) MAX 36 / AVE 16 ...

...HC (PPM) max 59 meas 176 - CO (%) max 0.49 meas 1.33 - NO (PPM) max 484 meas 134 Test 25 mph - RPM 1231 - %CO2 12.7 - %O2 0.1 - HC (PPM) max 34 meas 137 - CO (%) max 0.46 meas 3.76 - NO (PPM) max 711 ...

...HC (PPM) HC (PPM) MAX 64 Ave 28 MEAS 81 failed what is the issue i can be, only 2 things, or both. 1: engine running way too rich. 2: dead cat. (both happens, too) replace the cat, might be cheaper ...

HC ppm limit = 52, Reading = 17 Passes CO% limit = 0.29, Reading = 0.00 Passes curb idle HC ppm limit = 150, Reading = 13 Passes curb idle CO% limit = 0.70, Reading = 0.00 What are the possible causes

...HC (PPM) = 53 (max 66) CO (%) = 0.24 (max 0.57) *NO (PPM) = 755 (max 487) (Failed) 25mph - RPM = 1705 %CO2 = 12.7 %O2 = 3.0 *HC (PPM) = 60 (max 49) (Failed) CO (%) = 0.24 (max 0.55) NO (PPM) = 678 ...

...HC (PPM) = 160 (max 66) CO (%) = 0.74 (max 0.57) NO (PPM) = 3198 (max 487) 25mph - RPM = 1685 %CO2 = 14.3 %O2 = 0.6 HC (PPM) = 174 (max 49) CO (%) = 0.76 (max 0.55) NO (PPM) = 2755 (max 774) How well ...

...HC ppms and NOX ppm it would be very helpful but high hc and nox can be attributed to a faulty EGR system nox is produced when the combustion chamber temperature gets too high so a small amount of ...

...HC (PPM) MAX 61, GP 236, MEAS 19, CO (%) MAX 0.60, GP 2.10, MEAS 0.02, NO (PPM) MAX 717, GP, 1773, MEAS 1391, RESULTS FAIL Things to consider or replace... If you are getting a Check engine Light let ...

HC ppm 559. standard is 220. man at inspection said was missing at high idle,what can cause that?? First either replace or clean the idle air control valve.You can clean it with a non-chlronated brake