Close
QUESTIONS

RepairPal is your advocate for car care advice and guidance

Q: my honda accord 1993 se fail smog to much nox what repair is needed on 1993 Honda Accord

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
how can I pass smog
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
Get a Repair Estimate
Guaranteed by certified locations nationwide. Learn more
RepairPal estimates are guaranteed at over 1,700 quality certified locations nationwide. Learn more
hc(ppm) max 61 meas76 test 15mph 25mph max36 meas 57 the ci max0.51 meas0.75 15mph 25mph max0.49 meas0.69
ok, 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
hi mastertech about my 1993 honda accord not passin smog could the intake control soleniod valve be a problem from not producing enough air
this 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
mastertech 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?
Didn't find what you were looking for?