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Tuner in Training
TCC Oscillates above 70 mph
Put this up in the regular ECM area and should be here.
New 4L70E in a 03 Silverado that was a 5 spd.
Trans shifts fine and TCC applies above 40 > 45mph.
However as soon as I go over 70 MPH, the TCC starts oscillating On / Off every .5 or 1 second.
I can lock the TCC on with HP tuners scanner and it stays on. Everything in the scanner looks good going down the highway.
Anyone have any Ideas ?
I have Misfire disabled. With it on, the TCC would not come on due to the small cam.