Master Mechanic Diagnostic Sim vs Tuning Simulator

Think like a technician. Diagnose like a master. Master Mechanic is an interactive automotive diagnostic simulator built to sharpen the way you approach real-world vehicle problems. Open the repair order, evaluate the customer’s concern, select the right diagnostic tools, gather evidence, identify the root cause, and choose the repair that actually fixes the vehicle. This is more than a multiple-choice quiz. Every case challenges you to follow a logical diagnostic process and prove the fault before making the repair. REALISTIC DIAGNOSTIC CASES Work through 80 repair orders featuring vehicle information, mileage, customer complaints, service-writer notes, test results, verified root causes, and proper repairs. Progress through six skill levels: • Entry Level • Apprentice • Technician • Senior Technician • Master Technician • Diagnostic Specialist USE THE RIGHT TOOL FOR THE JOB Choose from commonly used diagnostic methods and equipment, including: • Scan tool data • Digital multimeter testing • Pressure testing • Smoke-machine testing • Visual inspections • Mechanical-noise inspection • Road testing Run productive tests, eliminate incorrect theories, and avoid wasting time or replacing parts without proof. YOUR DECISIONS MATTER Each repair order scores your performance based on: • Correct root-cause identification • Correct repair selection • Productive diagnostic testing • Diagnostic efficiency • Unnecessary or wasted tests You can identify the correct fault and still choose the wrong repair—just like in a real shop. Detailed results explain the diagnostic logic and provide key takeaways after every case. BUILD YOUR TECHNICIAN CAREER Earn XP, improve your accuracy, build diagnosis streaks, and advance from Lube Tech to Master Technician. Track your performance across every difficulty level and unlock achievements for great diagnoses—as well as a few memorable mistakes. DEALER MODE Choose from five fictional vehicle manufacturers and work through brand-focused repair orders across the complete difficulty ladder. All vehicle brands are fictional, allowing you to practice manufacturer-style diagnostics without representing any official OEM training program. REPAIR ORDER LIBRARY Search the complete case library, filter by difficulty, review previous attempts, track your best scores, and replay cases whenever you want to improve your process. AUTOMOTIVE PRACTICE TESTS Strengthen your knowledge across A1–A8 automotive subject areas with: • More than 60 questions in every category • Randomized 20-question practice tests • Rotating answer choices • Immediate feedback • Detailed explanations Practice content is independently created and is not affiliated with or endorsed by ASE or any vehicle manufacturer. START FREE. ADVANCE WITH PRO. Entry Level and Apprentice diagnostic cases are included. A one-time Master Mechanic Pro upgrade unlocks the complete advanced diagnostic ladder. No recurring subscription is required. BUILT FOR: • Automotive students • Entry-level and apprentice technicians • Experienced technicians sharpening their process • Instructors and trainers • Automotive enthusiasts who want a real challenge No advertisements. No account required. No cross-app tracking. Your simulator progress stays on your device. Master Mechanic is an educational training simulator. It is not a substitute for manufacturer service information, approved repair procedures, professional instruction, or hands-on safety training.

A simulated engine on a dyno, run by a standalone ECU you tune yourself. Change the fuel map, the timing or the boost and watch what happens to the power curve, the mixture and the knock sensor. It behaves like the real thing. The engine model runs every combustion event. Lean it out and it misfires. Add too much timing and it knocks, then cracks a piston. Fit bigger injectors without telling the ECU and it floods. THE ECU - Fuel VE, lambda targets, ignition, boost target and wastegate duty, idle, warmup, cranking, accel enrichment and dead times - Closed loop, knock control, rev and boost limiters, auto learn and "Fix from pull" - Select cells, drag curves, type values, interpolate and smooth, in a grid or in 3D - Lay the data log over any table and see which cells ran lean or knocked THE ENGINES - Ten engines: fours, a flat four, straight sixes, V6s and V8s - Naturally aspirated, turbo, twin turbo, supercharged and nitrous - Nearly 100 parts: injectors, pumps, lines, regulators, turbos, housings, wastegates, blowers, cams, pistons, rods, head gaskets and fuels, E85 included THE DYNO - Hold any rpm at any throttle, or do a full wide open throttle pull - Power, torque, mixture, boost and timing on every run - A full data log you can zoom into - Engine health: knock, over-revving, boost and heat all wear parts out, and some failures are sudden CAREER MODE Start with a rented unit, a small dyno, a stock project car and $1,500. Customers bring in cars with vacuum leaks, tired fuel pumps, stuck wastegates, burnt valves and lying sensors, or ask for a power target on a budget. Find the fault, fix it, tune it and hand it back for a test drive that grades your work. - Ten kinds of job, from base tunes to E85 conversions, race class builds and blown engine rescues - Eight regulars who bring the same car back chapter after chapter, with your parts and tune still on it - Diagnostic tools, a bigger dyno, more bays, weather, deadlines and rent - Dyno Day every Saturday against rival shops, and 23 achievements LEARN A guided tutorial takes a broken project car from flooding on the stand to a full tune. Twelve more lessons cover VE tuning, MBT, knock, boost control, injector swaps, fuel system limits, E85, nitrous, big cam idle and cold starts. GAME CENTER Leaderboards for peak horsepower and horsepower per litre. A pull only counts if the engine is still alive five seconds later. FREE AND PRO The Turbo Four and the guided tutorial are free, with every part and every table. Tuning Simulator Pro is a one-time purchase that unlocks all ten engines, custom builds, every lesson and Career mode. No subscription, no ads, no account.