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Re: Failed smog test - To many hydrocarbons at idle
Posted by KeithG [Email] (more from KeithG) on Wed, 28 Feb 2001 09:32:38
In Reply to: Failed smog test - To many hydrocarbons at idle, Cal, Wed, 28 Feb 2001 05:11:51
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High HC could be due to oil consumption at high vacuum conditions (idle). It could also be due to a rich idle setting on the AMM. It could also be due to a blown fuse on the o2 sensor (my bet). Have you looked at the O2 heater circuit to ensure that it has continuity and a 12V source? Have you replaced the o2 sensor before? What is it reading? If it is an AMM setting, you may be able to 'lean it out' a bit at idle with the adjustment on the AMM. I have not tried this. Have others had this problem? How far out of range was it?
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