Does anyone know if running better fuel or adding a additive will help pass smog?
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Better fuel is always a good thing but changing the grade or brand most likly won't solve your problem. I would start by making sure that the vehicle is tuned up properly and a cylinder leak down test is done prior to jumping in to the emissions systems. If the tune is good and the valves are set, then the next step is to verify that all the vacuum hoses are connected properly( see the emissions manual from toyota- its a must have). Most of the time I find failures from air injection systems not functioning properly or hoses hooked up wrong. If air is going into the air cleaner housing via the large hose on the passenger side you have a problem. Conversly if the air pump is not drawing any air you have a problem.Haskins1111 said:Does anyone know if running better fuel or adding a additive will help pass smog?
Better fuel is always a good thing but changing the grade or brand most likly won't solve your problem. I would start by making sure that the vehicle is tuned up properly and a cylinder leak down test is done prior to jumping in to the emissions systems. If the tune is good and the valves are set, then the next step is to verify that all the vacuum hoses are connected properly( see the emissions manual from toyota- its a must have). Most of the time I find failures from air injection systems not functioning properly or hoses hooked up wrong. If air is going into the air cleaner housing via the large hose on the passenger side you have a problem. Conversly if the air pump is not drawing any air you have a problem.Haskins1111 said:Does anyone know if running better fuel or adding a additive will help pass smog?