Having problems with your Cars & Trucks ?
My 1989 dodge ram 250 van failed smog check due to hc (ppm). what should i look at?
\015 The van has always passed the smog check with flying colors but not this year. Here are the numbers from my smog test\012 At 15mph-rpm 1194- CO2 11.05- 02 4.91- HC (ppm) 172- CO 0.52- NO (ppm) 542. \012 At 25mph- RPM 1364- CO2 10.33- 02 5.82- HC (ppm) 178- CO0.47- NO (ppm) 442.\015
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