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Added July 05, 2025 by nmessana
1. Odd BOV behavior. Feels like it opens prematurely when slightly letting off throttle, opens between upshifts and downshifts (maybe this is normal) 2. Car jerks forward pretty harshly when abruptly letting off throttle, so I’ve been feathering off throttle. 3. Feels like I have a boost leak even though I’ve smoke tested and determined no leaks. Mild whooshing sound when on light throttle (not DCI whooshing) Related to BOV behavior? Manifold is tapped for a 1/4in BOV line. 4. I took spark plugs out of engine to do a compression test 20-30mins after the initial startup after finishing the build. Cylinders 3 and 5 spark plug tips were black. Leaky injectors? Does this affect tuning/performance? 5. Rough shifts. Although not sure this is tuning related. I replaced mechatronic seals about 10k miles ago and have been having erratic shift behavior ever since. Adaptation values seem to be messed up so I am going to try resetting and relearning but I wanted to send the log before that.
  • 93 Octane
1. Odd BOV behavior. Feels like it opens prematurely when slightly letting off throttle, opens between upshifts and downshifts (maybe this is normal) 2. Car jerks forward pretty harshly when abruptly letting off throttle, so I’ve been feathering off throttle. 3. Feels like I have a boost leak even though I’ve smoke tested and determined no leaks. Mild whooshing sound when on light throttle (not DCI whooshing) Related to BOV behavior? Manifold is tapped for a 1/4in BOV line. 4. I took spark plugs out of engine to do a compression test 20-30mins after the initial startup after finishing the build. Cylinders 3 and 5 spark plug tips were black. Leaky injectors? Does this affect tuning/performance? 5. Rough shifts. Although not sure this is tuning related. I replaced mechatronic seals about 10k miles ago and have been having erratic shift behavior ever since. Adaptation values seem to be messed up so I am going to try resetting and relearning but I wanted to send the log before that.
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