[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-496098-105":3,"detail-sidebar-cat-0-en-105":73,"doc-detail-496098-en":123},{"code":4,"msg":5,"data":6},0,"ok",{"site_id":7,"language":8,"slug":9,"title":10,"keywords":11,"description":12,"schema_data":13,"social_meta":66,"head_meta":68,"extra_data":70,"updated_unix":72},105,"en","ase-practice-test-a8-engine-performance-diagnosis-and-repair","ASE Practice Test A8 - Engine Performance - Diagnosis and Repair","","ASE Practice Test A8 focuses on engine performance diagnosis and repair across multiple systems, guiding technicians through safe, structured diagnostic steps. The test covers general diagnosis order, drivability workflow, use of online versus paper service information, and identifying required vehicle data. It further evaluates ignition system diagnosis, NO START and misfire conditions, fuel/air/exhaust emission-related checks, OBD II behavior, and computerized engine control retraining decisions, culminating in scenario-based multiple-choice troubleshooting.",{"@graph":14,"@context":65},[15,34,56],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/exam/","Exam",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/ase-practice-test-a8-engine-performance-diagnosis-and-repair/496098/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/ase-practice-test-a8-engine-performance-diagnosis-and-repair/496098.png","ImageObject",300,407,{"name":42,"@type":43},"River Wang","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-11-10","2026-10-02",true,{"@type":52,"interactionType":53,"userInteractionCount":55},"InteractionCounter",{"@type":54},"ViewAction",18,{"@type":57,"mainEntity":58},"FAQPage",[59],{"name":60,"@type":61,"acceptedAnswer":62},"Which component information is needed to locate specific service information?","Question",{"text":63,"@type":64},"The needed information is the vehicle make, model, and year.","Answer","https://schema.org",{"og:url":32,"og:type":67,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":69,"canonical":32},"index,follow",{"doc_id":71,"site_id":7},496098,1791589949,{"code":4,"msg":74,"data":75},"success",[76,80,84,87,92,97,102,107,112,115,119],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":77,"show_sort_weight":78,"slug":79},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":81,"show_sort_weight":82,"slug":83},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":85,"slug":86},70,"exam",{"id":88,"doc_module":4,"doc_module_name":25,"category_name":89,"show_sort_weight":90,"slug":91},5,"Comic",60,"comic",{"id":93,"doc_module":4,"doc_module_name":25,"category_name":94,"show_sort_weight":95,"slug":96},6,"Technology",50,"technology",{"id":98,"doc_module":4,"doc_module_name":25,"category_name":99,"show_sort_weight":100,"slug":101},7,"Healthcare",40,"healthcare",{"id":103,"doc_module":4,"doc_module_name":25,"category_name":104,"show_sort_weight":105,"slug":106},8,"Research & Report",30,"research-report",{"id":108,"doc_module":4,"doc_module_name":25,"category_name":109,"show_sort_weight":110,"slug":111},9,"Religion & Spirituality",20,"religion-spirituality",{"id":110,"doc_module":4,"doc_module_name":25,"category_name":113,"show_sort_weight":110,"slug":114},"World Cup","world-cup",{"id":116,"doc_module":4,"doc_module_name":25,"category_name":117,"show_sort_weight":116,"slug":118},10,"Lifestyle","lifestyle",{"id":120,"doc_module":4,"doc_module_name":25,"category_name":121,"show_sort_weight":88,"slug":122},19,"General","general",{"code":4,"msg":74,"data":124},{"doc_id":71,"user_id":125,"nickname":42,"user_avatar":126,"doc_module":4,"category_id":33,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":127,"file_id":128,"file_url":129,"file_type":130,"file_size":131,"view_count":55,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":33,"language":132,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":133,"faqs":134,"seo_title":135,"seo_description":12,"update_tm":136,"read_time":116,"preview_page_count":4},1099514067438,"https://ap-avatar.wpscdn.com/avatar/100002539ee87300030?x-image-process=image/resize,m_fixed,w_180,h_180&k=1780474512215547542","ASE Practice Test A8  \nEngine Performance  \nGeneral Engine Diagnosis  \n1) Which of the following should be the first step in diagnosing an engine performance concern?  \na. Discussing concern with the vehicle owner  \nb. Retrieve diagnostic trouble codes  \nc. Check for symptoms in the online service manual  \nd. Road test the vehicle  \n2) Using a diagnostic strategy for a drivability concern, which of the following is generally the last step in that process?  \na. Checking vehicle history  \nb. Verifying repair  \nc. Doing service checks  \nd. Verifying concern  \n3) Technician A says paper service manuals are still used in today’s service world. Technician B says to follow the recommended service procedures contained in the online service information. Who is right?  \na. A only  \nb. B only  \nc. Both A and B  \nd. Neither A nor B  \n4) When looking for specific service information, what vehicle information is needed to locate the information?  \na. Vehicle VIN  \nb. Vehicle build date  \nc. Model year  \nd. Make, model and year  \nIgnition Systems Diagnosis and Repair  \n5) A NO START condition is being diagnosed on a vehicle with electronic fuel injection (EFI) and distributorless ignition. Technician A says you should only use a DMM (Digital Multimeter) to check voltage values on PCM (Powertrain Control Module) . Technician B says you should use a tool to check for spark at one of the spark plugs. Who is right?  \na. A only  \nb. B only  \nc. Both A and B  \nd. Neither A nor B  \n6) What is being done in the illustration?  \na. Adjusting electronic timing  \nb. Adjusting ignition timing  \nc. Checking ignition coil polarity  \nd. Checking for spark with an ST125  \n7) Technician A says an engine could misfire under load if the ignition coil is tracked. Technician B says the pickup coil must have dielectric grease under it. Who is right?  \na. A only  \nb. B only  \nc. Both A and B  \nd. Neither A nor B  \n8) A 12 volt test light is connected from the negative primary coil terminal to ground on an electronic distributor ignition (DI) system. The light flutters while cranking the engine. A spark tester does not fire when it is connected from the coil secondary wire to ground while cranking the engine. Which of the following is the MOST likely cause?  \na. Defective engine coil  \nb. Defective pickup coil  \nc. Defective ignition module  \nd. Defective spark plug  \nFuel, Air Induction and Exhaust Systems Diagnosis and Repair  \n9) Two technicians are discussing emission diagnosis. Technician A says an ignition misfire will increase CO and HC emissions and set a DTC (Diagnostic Trouble Code) . Technician B says a misfire caused by a lean condition will increase HC and CO emissions without a DTC set. Who is right?  \na. A only  \nb. B only  \nc. Both A and B  \nd. Neither A nor B  \n10) A scan tool is being used to check fuel injector balance. Based on service manual procedure, what is the expected result if the injector is functioning properly?  \na. Engine RPM should increase as each injector is turned off  \nb. Engine RPM should decrease as each injector is turned off  \nc. ECT (Engine Coolant Temperature) voltage should decrease  \nd. ECT (Engine Coolant Temperature voltage should increase  \n11) During an injector power balance test, a technician finds one injector has failed but is receiving a good power supply. What should be done next?  \na. Voltage check of the injector ground  \nb. Voltage check at the ignition power feed  \nc. Continuity check between PCM and injector  \nd. Continuity check between fuse and injectors  \n12) Which of the following cold cause a vehicle to run poorly after the battery was discharged or disconnected?  \na. PROM (programmable read only memory) failed  \nb. EPROM (erasable programmable read only memory) failed  \nc. Learned value has been lost from RAM  \nd. Learned value has been lost from ROM  \nEmission Control Systems Diagnosis and Repair  \n13) Technician A says a crushed PCV hose affects idle on some engines and can cause and oil leak. Techni","cbCaik8DqmeLbXno","https://ap.wps.com/l/cbCaik8DqmeLbXno","pdf",169483,"English","# Engine Performance\n## General Engine Diagnosis\n## Ignition Systems Diagnosis and Repair\n## Fuel, Air Induction and Exhaust Systems Diagnosis and Repair\n## Emission Control Systems Diagnosis and Repair\n## Computerized Engine Controls Diagnosis and Repair","[{\"question\":\"Which component information is needed to locate specific service information?\",\"answer\":\"The needed information is the vehicle make, model, and year.\"}]","ASE Practice Test A8 - Engine Performance - Diagnosis and Repair | PDF",1790927748]