1990 Toyota Corolla - Would new tires help me pass the smog check?

Would it help my Toyota Corolla pass the smog test if I put new tires on the car, therefore increasing the diameter of the tires during the test? Would it help to put oversize wheels and tires on the car to pass the smog test? Would it help to put double the normal tire pressure to pass the smog test?

Answer:

Your Toyota Corolla's engine and transmission are geared to allow optimum fuel efficiency only when equipped with the proper and required tire size. We do not recommend installing any size of tire other then what Toyota has recommended for your car. We do strongly recommend however that you ensure proper time pressure. Low tire pressure will put a greater load on your Toyota Corolla when it's being driven on the dynamometer during the smog check. Over inflated tires will not pose an emissions problem but will cause instability while being driven on the dyno; so we can't recommend that as well.

posted by SmogTips Support