Hydrocarbon way too high
08-24-2009, 10:28 AM
#1
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Hydrocarbon way too high I tried to go through inspection today and failed hiserably. HC limit is 220 mine maxed the machine out at 4200+, the guy laughed at me. I put cats on it before i went down there and it doesn't look like that helped my HC. What can i do to lower HC? the car is cammed and has been tuned.
08-24-2009, 02:46 PM
#3
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Hydrocarbons are unburnt fuel. Check your o2s, spark plugs etc. Are your exhaust tips black? Soot all over the back of the car?
Are you getting a lot of blow-by through your PCV now that you have an agressive cam? This could throw the O2 off.
Are you getting a lot of blow-by through your PCV now that you have an agressive cam? This could throw the O2 off.
