08-19-2008, 04:37 PM
[quote macone][quote Filliam H. Muffman]I agree that using premium in a car it is not designed for will not help for something like this.
For smog tests you do want to use Premium. It helps to keep the NOx down and slows the burn. By the numbers, I would suggest driving the piss out of the car prior to the smog test. Include 20 minutes on the freeway and a little Heet (Product name) wouldn't hurt.
Unless you are a smog tech or have worked as a mechanic tuning cars for emissions, I will disagree.
In any case, I still stand by my comment that the car is running too rich. The mixture should be leaned out until the O2 jumps and then backed off. Having a quick adjustment by a mechanic with a combustion meter might be all it needs.
I had a car that would not pass smog unless it was driven right on the rollers. It failed twice until I got someone that shifted quickly and accelerated properly to the right speed. The carb fed rotary in my RX-7 would put out a bump in HC when you lift off the gas pedal on shifting and then stomp on it at a low RPM because of the accelerator pump circuit.
For smog tests you do want to use Premium. It helps to keep the NOx down and slows the burn. By the numbers, I would suggest driving the piss out of the car prior to the smog test. Include 20 minutes on the freeway and a little Heet (Product name) wouldn't hurt.
Unless you are a smog tech or have worked as a mechanic tuning cars for emissions, I will disagree.
In any case, I still stand by my comment that the car is running too rich. The mixture should be leaned out until the O2 jumps and then backed off. Having a quick adjustment by a mechanic with a combustion meter might be all it needs.
I had a car that would not pass smog unless it was driven right on the rollers. It failed twice until I got someone that shifted quickly and accelerated properly to the right speed. The carb fed rotary in my RX-7 would put out a bump in HC when you lift off the gas pedal on shifting and then stomp on it at a low RPM because of the accelerator pump circuit.