i was wonderin is there any suggestion from people this is what i did to the car after i fail the smog test from the ref cuz i got a ticket from the cop.
i replaced.. the 02 sensor the cat (used)
did a tune up ( dizzy cap, rotor,spark plugs, wires, and pcv valve), changed the oil, changed the air filter. and it has and bolt on exhaust. i did a pre test and it passed at 15mph and it pass at 25 mph expect for the nox. any suggestion. i have to go to the ref again next week. thanks

 

check egr if you have one

 

oh its an 93 del sol so it wont have an egr

 

um... so one knows what it could be....help please

 

and that motor was the orginal motor...the owner b4 i bought it turboed the car...so do you think the motor can cause not to pass? should i just get another motor??

 

Stock ECU???

 

Does it have bigger injectors?

 

what is the reading on the nox....aim me up mrcivicsi069...i might be able to help you