Quote Originally Posted by dave w View Post
I wonder if blowing compressed air into the throttle body (throttle blades closed) will cause a rich running engine to temporarily run lean. Seems logical, but I've never tried blowing compressed air into a rich running engine.
I have chip burning capabilities. When a data log (spreadsheet) shows a rich running engine I adjust the injector flow parameter. Often an increase in the injector flow rate will "lean" a rich running engine. For example; when most of the AFR's are consistently in the 12's I will increase the TBI injector flow rate from 61 lbs hr to 65 lbs hr and see what the data log (spreadsheet) shows. Increasing the injector flow rate will "make the computer think" less fuel is needed from the injector.