Over the years we have inevitably run into customers who were tuned by other shops at some point in the car’s life. Sometimes the customer we are dealing with is aware of the tune, and other times they are secondary owners that had no clue what work the previous owner had done to the car. Either way, they turn to us for some performance parts and tuning and we are glad to help.
Usually when we run across a car that was previously tuned it was work done by one of our competitors, and the tune will have many logical adjustments made to it that are appropriate for someone tuning this type of ECU. Other times we run across situations that are much more mind bending, and that’s where we bring us to today.
While observing some logs on a customer’s car that we all believed to be a STOCK 2008 Solstice GXP, the logs started to reveal some irregularities. Our first clue that something was not stock was that the MAF sensor was seeing much more airflow than stock. There were many other red flags that turned up in the “stock” tune that quickly indicated to us that something was WRONG. So we downloaded the tune off of the ECU to see what was up.
Right away, it became apparent that this file was not stock at all, but it also was not a file written by someone with specific knowledge on how to tune an LNF engine either. At best, this file looked like it was touched by someone who was used to tuning other types of turbocharged motors, but that someone had no clue about direct injection fueling or an ECU that used torque calculations (like the Bosch Controller we have in the Solstice, Sky, HHR, and Cobalt).