I had an incident yesterday where I went to accelerate with a BMW M5 and I noticed a lack of power. A few more pulls and it was apparent that there was no boost at all. Today, everything seems fine so far. A little background: -Bought used, has 130k miles -No tune or mods as far as I can tell -The car was fully warm and I had been driving normally for about 20-30 minutes prior -While there was not very much power, it was VERY smooth. -No check engine light or codes thrown. I do have a PC based scan tool with some logging abilities. What parameters/PID's should I be monitoring? Thanks in advance for any insight provided!