Lesson 1Visual inspection checklist: intake, vacuum lines, ignition, fuel system, sensorsE go give you systematic visual check routine before you do advance testing. You go check intake parts, vacuum lines, ignition components, fuel system, and sensors wey you fit see to catch obvious problems quick quick.
Inspecting intake ducts and air filter boxChecking vacuum hoses and PCV routingReviewing coils, wires, and spark plugsLooking for fuel leaks and line damageSensor connector and harness inspectionLesson 2Repair planning: parts to consider (fuel filter/pump, injectors, ignition coils/plugs, MAF, intake gaskets), special tools, torque specs lookup strategyE go guide you to plan repairs when you don find the faults. You go list likely parts, check if dem fit, plan wetin tools you need, and find torque specs and procedures so you no go waste time or labor.
Listing probable parts by systemChecking part numbers and compatibilityIdentifying needed special toolsFinding torque specs and sequencesPlanning workflow to reduce reworkLesson 3Interpreting diagnostic results: mapping symptom -> data pattern for common causes (vacuum leak, faulty O2/MAF, weak fuel pump, ignition fault, coolant/temp sensor)E go teach you how to link symptoms with data patterns to find likely causes. You go map fuel trims, O2, MAF, and misfire data to problems like vacuum leaks, weak pump, ignition issues, and coolant sensor faults.
Recognizing vacuum leak data signaturesPatterns of weak fuel pump or restrictionIdentifying faulty O2 or MAF behaviorIgnition fault clues in misfire countersCoolant sensor errors and warm-up dataLesson 4Post-repair validation: warm-up behavior, fuel trim normalization, CEL verification, test drive acceptance criteriaE go teach you how to confirm repairs by watching warm-up, fuel trims, and check engine light. You go set test drive routes, acceptance criteria, and document steps to make sure the problem don finish.
Verifying cold and hot restart performanceMonitoring short and long term fuel trimsConfirming CEL status and code clearingDesigning a representative road test routeDefining pass or fail criteria and notesLesson 5Sensor and control component testing: MAF cleaning/check, intake vacuum/leak detection, EVAP leak test, cam/crank correlation checkE cover testing key sensors and controls wey affect start, idle, fuel use. You go learn MAF clean and check, vacuum leak find, EVAP leak test, and cam-crank match check.
MAF visual check, cleaning, and output reviewSmoke and propane tests for vacuum leaksEVAP leak test basics and common faultsCam and crank signal correlation checksInterpreting scan data from key sensorsLesson 6Basic bench and in-vehicle tests: fuel pressure, fuel rail leakdown, injector balance, compression test, cylinder misfire isolationE cover main bench and in-car tests to separate fuel, air, mechanical faults. You go measure fuel pressure, check leakdown, balance injectors, do compression test, isolate bad cylinders safe.
Static and running fuel pressure measurementFuel rail leakdown and regulator evaluationInjector balance and flow comparison methodsCompression and relative compression testingCylinder disable tests for misfire isolationLesson 7Customer communication script: plain-language explanation of findings, recommended repairs, risks of delay, maintenance adviceE show you how to explain findings and repair plans in simple talk. You go practice scripts wey cover wetin you find, recommended work, risks if delay, costs, and easy maintenance advice to build trust.
Explaining fault codes in simple termsDescribing test results without jargonPresenting repair options and prioritiesDiscussing risks of delaying repairsGiving preventive maintenance guidanceLesson 8Cold-start and warm-up road test procedure and expected observationsE outline controlled cold-start and warm-up road test. You go learn steps, safety checks, expected RPM, idle, temp rise, fuel trims from start to full warm.
Pre-start checks and ambient conditionsObserving initial crank and first idleMonitoring warm-up RPM and idle changesWatching coolant temp and closed loop entryRecording fuel trim trends during warm-upLesson 9Targeted customer intake questions for engine starting and idle issuesE focus on structured questions wey reveal patterns in start and idle problems. You go learn to ask about conditions, fuel use, lights, past repairs, driving habits for quick targeted diagnosis.
Clarifying cold versus hot start conditionsQuestions on idle quality and stall eventsHistory of recent repairs and fuel qualityDriving patterns, trip length, and load useDocumenting warning lights and noisesLesson 10OBD-II scan strategy: reading freeze frame, pending/confirmed codes, live data PIDs to monitor (RPM, long/short fuel trims, O2, MAF, MAP, IAT, engine coolant temp)E explain step-by-step OBD-II scan. You go read freeze frame, pending/confirmed codes, pick key PIDs like RPM, fuel trims, O2, MAF, MAP, IAT, coolant temp to guide diagnosis.
Capturing and reading freeze frame dataSorting pending versus confirmed codesSelecting essential live data PIDsUsing fuel trims to narrow fault areasSaving and printing reports for recordsLesson 11Pre-drive and lift safety checks: battery, fuel leak, EVAP, cooling, mountsE detail pre-drive and lift checks to protect you, vehicle, others. You go check battery, fuel/EVAP leaks, cooling, engine mounts before road test or lift.
Battery state, terminals, and cable securityFuel, EVAP, and exhaust leak inspectionCooling system level, leaks, and fan checkEngine and transmission mount conditionVerifying tire, brake, and steering basicsLesson 12Electrical and ignition tests: primary/secondary ignition checks, coil-on-plug testing, spark analysis with scope or substitute methodsE focus on electrical/ignition tests for hard start, rough idle. You go do primary/secondary checks, test coil-on-plug, analyze spark with scope or other tools.
Primary ignition voltage and control checksSecondary ignition pattern interpretationCoil-on-plug resistance and output testsUsing scopes for spark and trigger signalsSubstitute tools when scopes are unavailableLesson 13Estimating labor and parts costs: time study approach, labor guides and parts sourcing checklistE explain how to estimate labor/parts for drivability repairs with time studies, guides, checklists. You go account for diagnostics, rechecks, real parts price for good quotes.
Breaking jobs into estimate line itemsUsing labor guides and flat rate dataBuilding a parts and consumables checklistComparing OEM and aftermarket optionsIncluding diagnostic and recheck time
