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I have a C7 Z06 A8 2015 with some bots-on (AFE cold air, ARH headers, Lower Pulley +15%, meth kit, bigger rear drags radials, Rear end gear ration change and a tune) At part throttle transmission is shifting very well but at WOT shit 1-2 and 2-3 transmission do not shift when required. Shift 3-4 and 4-5 are fine and firm.
DESCRIPTION OF WHAT HAPPEN: Car accelerate over MPH and engine RPM programed. Engine rpm raise to limiter, throttle close, spark become negative, car slow down some mph AFTER AN ETERNITY, car shift, throttle reopen, and spark raise and re-accelerate.
I did use HPT to do some changes:
1. MAF calibration
2. POWER ENRICHMENT adjust
3. Reprogram with gear/tire wizard
4. reduce shift RPM (part throttle and full throttle)Normal-A-B
5. reduce shift speed (part throttle and full throttle) Normal-A-B
6. raise shift pressure
7. raise shift inertia
8. reduce shift time
9. raise Trans default torque limits
10. Raise engine peak torque, delivered torque max?..
11. play with Driver demand tables (up or down lines 74-86-100)
12. adjust some spark tables
I am a beginner tuner, I do tuning only on my car and I really need a help! I do not know if I made some change in ECM or TCM that generate my problem. Is this a result of torque management or some conflicts between tables?
What tuners think about my problem and how to log data and resolve my problem. Can you refer me to some thread about this subject? THANKS