In this Motor Age Tech Tip Short, Keith Perkins walks viewers through diagnosing a drivability issue on a 2014 Volkswagen Jetta using the Autel MaxiSYS Ultra S2 scan tool. He demonstrates how to graph and merge live data for key engine parameters like calculated load, engine RPM, short- and long-term fuel trims, intake manifold absolute pressure, and airflow rate. Viewers learn how to convert units for easier interpretation and how to flag specific moments during a test drive for later review. This process makes vehicle diagnostic data review more efficient, helping to pinpoint drivability issues with greater accuracy.
Perkins demonstrates how to use the recording and playback features to navigate frame by frame through the event, offering practical insight into real-world engine performance troubleshooting tips. If you want to improve your workflow or better understand fuel trim and airflow analysis, this quick video provides a clear and useful breakdown.
For more information on the Ultra S2, visit https://autel.us/product/maxisys-ultra-s2/.
About the Author
Keith Perkins
Keith Perkins has been in the industry for over 19 years, serving in various capacities, including engine machinist and assembler, dyno tuner, diagnostic technician, instructor, technical information specialist, repair technician, and many more roles through the years.
Currently, Perkins co-owns and operates the L1 Automotive Group with his wife. The L1 Automotive Group is comprised of three companies: L1 Automotive Diagnostics and Programming, Level 1 Automotive, and L1 Automotive Training.
Perkins currently holds the title of ASE Master Certified L1 Technician and ASE certifications A1-A9, L1, L4, X1, P2, xEV Level 2, and various other industry certifications. He also serves as a Subject Matter Expert for the ASE A1, A2, A7, A8, L1, and L4 tests.
Perkins has served on the Board of Directors for NASTF since 2023. He enjoys spending time with his wife of 18 years, Liz, and his two daughters, Rylynn and Bailey, in his off time. His favorite non-automotive activity is skydiving!