Wasted $230 on a "fuel saver" tuner for my 7.3 and all it did was throw codes
Back when I was greener I bought one of those plug in chips off a guy at a truck pull in Amarillo, ran it for 3 months, lost maybe 1 mpg and got a check engine light that took me half a day to trace back to that box, so what cheap part did you all get burned on before you knew better?