Mercedes M139 Rough Running or Hard Start? Compare Compression Before Teardown
Diagnose M139 rough running or hard starting with a four-cylinder relative-compression comparison and model-family engine-number clean-point gate.
Tag Symptoms
2024–2025 Jeep Compass or Meridian A/C Blows Warm? Let the Vacuum Cycle Choose the Branch
Keep the 2024–2025 Compass/Meridian warm-A/C bulletin inside its market fence and use its recovery-and-vacuum pass/fail gate correctly.
2024–2025 GM LK0 Coolant Smell? Inspect the Cylinder Head Before Calling It a Hose
Diagnose coolant smell or leakage at the top of a 2024–2025 GM 2.5L LK0 engine with a four-view seepage record before calling it a hose or porous head.
2022 KTM 200 Duke Rough Idle? Check TPS Voltage at Both Ends
Diagnose an affected 2022 KTM 200 Duke rough idle through VIN eligibility, two TPS voltage endpoints, proper positioning and initialization.
2021–2025 Durango or Grand Cherokee Extended Crank? Time the Fuel-Pressure Drop
Turn extended crank on a scoped Durango or Grand Cherokee into a timed fuel-pressure leak-down record before replacing the regulator.
2014–2019 Cadillac CTS Battery Dies? Test for Aftermarket Lamp Backfeed
Diagnose a 2014–2019 Cadillac CTS dead battery by testing whether an aftermarket park/turn lamp backfeeds the BCM and prevents normal sleep.
Maserati Battery Keeps Dying? Build a Before-and-After Evidence Record
Turn repeated Maserati battery discharge into a before-and-after evidence record covering use, terminals, full recharge, four-hour rest, and parasitic draw.
Ducati Multistrada V4 Hard Starting or P061B? Check MAP Sensor Seating
Diagnose Multistrada V4 hard starting, erratic idle, MAP errors, or P061B by pairing electronic freeze-frame evidence with physical as-found sensor photos.
BMW S 1000 RR Multiple Warnings and Rough Running? Inspect Harness Chafe
Connect multiple BMW S 1000 RR/HP4 warnings and rough running to a left/right harness-route overlay before replacing modules.
2024 GM 1.2L Blue Smoke Under 2,000 Miles? Compare All Cylinders
Diagnose low-mileage blue smoke on 2024 GM 1.2L LIH vehicles with an all-cylinder evidence dossier and a controlled 100-mile oil record.