The guys at the smog place suggested that maybe I needed to adjust the fuel mixture which is through the top of the air cleaner.

I noticed that the little tower at the top of what I think is the meter-control unit has been shaved? I do see an allen screw in there and it takes a #3 mm allen--but it doesn't seem to make any difference when I turn it--not sure if it is working? Maybe not holding adjustment?

History of this fuel injection system: About a year-and-a-half ago I had a fuel leak at at one of the fuel systems electronic pieces (which one I don't remember). I purchased a used fuel system complete from an auto salvage yard in Huntington Beach--and now I find out that they sold me one with a shaved meter-control unit that I believe will not adjust.

I called to complain but the auto salvage yard said not warranty after 30-days and will sell me another for a $100 this time-- which is a $50 discount.

Could this be my problem? Or am I going to waste a $100.?