Diablosport Forums

I bought a 2005 Mustang GT. The car came with a U7140. It already had the Diablosport JLT CAI and a +2 timing advance when I bought the car. I was looking for the 87 Performance Tune but did not find it. I installed the JLT Performance Tune.

Two questions. First, now the traction control is always off. Is this normal?
Secondly, how do I get to the 87 Octane Tune. Thanks

You should be able to reset the TC to its default ON setting in the "Modify Parameters" section.
I believe the default JLT tune is designed to run with 91 octane fuel, and the previous owner probably was using 93 octane if there is a +2 degree timing advance. If you plan to use 87 octane, then retard the Global Timing to a -4 degree setting. Also, check that the 2-4K rpm and 4-7K rpm spark settings are set at 0%.