We just replaced the stock injectors on our 98 TDI with Bozio 520. It smokes, and the mileage has gone from over 50 mpg to around 40 mpg or less. I guess these nozzles are nominally .205 but act like larger ones. I might hold onto these for when I get a turbo and chip upgrade, but in the meantime, I would like to go back to higher mileage and no smoke. Suggestions?