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Question: my honda accord 1993 se fail smog to much nox what repair is needed
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mastertech6371 March 08, 2011, 17:12
Masterwhat was the hc and co readings??
Roy
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low rider, March 08, 2011, 17:43
Rookiehc(ppm) max 61 meas76 test 15mph 25mph max36 meas 57 the ci max0.51 meas0.75 15mph 25mph max0.49 meas0.69
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mastertech6371, March 08, 2011, 18:00Masterok, a couple of things. with both the hc and co high, i would install a new o2 sensor. i would also change the oil and filter. that will increase your nox reading. i hate to say this but the cat is going to have to be replaced as well. it cannot process the gases and break them down.
Roy
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Visitor, March 15, 2011, 16:27hi mastertech about my 1993 honda accord not passin smog could the intake control soleniod valve be a problem from not producing enough air
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Visitor, March 15, 2011, 17:01this will effect the mixture going tinto the cylinders for the perfect 14.7 to 1 air fuel ratio. it will not change the fact that the cat is worn out.
Roy
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Visitor, March 17, 2011, 15:54Replymastertech you say that the cat is worn out,then why is it that my honda has no problelm driving 80 mph and starting right up?
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Visitor, March 08, 2011, 17:33ReplyWe gonna need more info than that! Come on...
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Hal... (see my shops), March 08, 2011, 17:35Reply
MasterPlease more specific. Your vehicle has a number of common repairs to make it run more efficiently.
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