Hi everyone

I took my car to the mechanic to have the CEL code ran, and he said that my engine ran too lean. He had the carbon cleaner put in the car, and it was fine. But I was on my way home and alas, it came back on. He suggested I put in fuel injector cleaner. does anybody have any suggestions on what type i should put in? I put in Lucas cleaner, but it still stayed on. Any help is appreciated. Thank you


98 Ford Contour GL 4 cyl Zetec Engine Manual Transmission