2014 Cadillac CTSV Coupe / A6. Hitting a speed limiter right about 117MPH and 5850RPM. All RPM limits and torque limits have been raised well beyond this so I figure the limit is somewhere in the speed limiters. Switched from GMLAN to Calibration and maxed out values and I get no throttle response at all. Switch back to GMLAN and it takes 6 or 8 key cycles to get throttle back. Will do the same thing if I just try to adjust tire size (owner has gone from 26.05" to 26.7" tires). The GMLAN => Calibration has always worked in the past.
Flashing back to the starting file (in reply below), once I can get the throttle responding again the ABS seems to be confused for a bit and will rapidly modulate the rear brakes at about 60MPH on the next pull. Takes several key cycles again to get the ABS to buy into the situation and let me make a pull up to the limit point again.
OS is 12656245 and TCM is 24264923. 2014 CTSV coupe, 6.2L S/C A6
Last edited by jchambers; 07-22-2015 at 06:45 AM.
Reason: More info added.
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