I have a hypertech tune installed on my 96 GT and i pulled the plugs and everyoneof them was running lean. however, it looked like it was leaning out for olny for a little while. When i ran my car at the 1/4 mile the best i ran was 15.0. so is the tune doing more bad then good? please help me i dont want to rune my car. thanks

 

I tried the Hypertech tune, but I liked having good throttle response and good gas mileage without pinging when using the best fuel available...so I run a stock tune. [:'(]Hypertech[:'(]

 

yea hypertech is kinda a dissapointment but i still like the shift firmness.