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View Full Version : my ka24e wont pass smog


eliminator024
01-20-2011, 01:48 PM
I have a 1990 240sx and it wont pass smog I live in socal
my results were

15mph/ hc 168/ co 5.56/ no 655
25mph/ hc 121/ co 5.93/ no240

What is wrong with my car I have resently put in the engine about 3 months ago I have upgreaded exaust headers and 2.5 pipeing could that be the cause the o2 sensor is only on the fourth cylinder as well

My tags are allready up and I don't have a car to drive please help