Does anyone have any suggestions regarding a code 16 which i believe is the fuel injection code. For some strange reason the engine light seems come on at a higher rpm or if I am at a higher speed, I used 3 bottles of fluid in the gas and made a big difference on the fuel economy and in performance, I do notice however since I stopped using the fluid that I seem to be getting the odd acceleration drag and studder. One item to add as well that I recently had an engine swap performed and it was an 130K engine that came from an automatic, the throddle body and everything else was transfered onto this car. Any advice or tips is greatly welcomed. Thank you.