Bob Vaughn wrote:
I received an email and video from Trailer Life about Bully Dog GT tuners for diesel engines. It all sounds good but I have been warned that the warranty would be voided if I use a tuner. Now I wonder if this is true. If so then I guess I will have to wait until my warranty is up. It is 699 bucks and I wonder if there is enough of a fuel economy savings to ever break even?
I used a Hypermax ECON tuner on my 6.0 Powerstroke. The good news is that it picked up my mileage by 2-3 MPG and gave my noticeably more torque.
The bad news is that I blew a head gasket and the shop said it was because of the tuner. $7500 for the repair bill