ASE A8 Practice Test Questions And Answers

ASE A8 Practice Test Questions And Answers visual inspections after finding a dtc - ANSWER check vacuum lines check belts check battery and connections inspect wiring for sensors and outputs check coolant and condition of it check air filter and inlet check for exhaust leaks if no dtc are present - ANSWER see if data is within normal ranges pcm power and ground are in good condition identify all vehical mods tire inflation Hard Start/Long Crank symptom with no dtcs - ANSWER componants/system Starting System Fuel/Ignition/Computer Intake Air System MAF Sensor Exhaust System PCV System EVAP System possible causes Weak battery, poor battery connections, defective starter Low fuel pressure or volume, weak spark, incorrect spark timing, TP, ETC, MAF/MAP sensor faults Restriction in intake air system, plugged air filter, induction air leak Dirty, misreading or defective MAF sensor Restricted exhaust system Damaged or disconnected PCV hose Fuel vapor purge during cranking No Crank symptom with no dtcs - ANSWER componant/system Anti-Theft Devices Base Engine Starting system possible cause Fault with key, encoder, remote, or lack of network communication Seized or hydraulically locked engine Defective starter, starter relay, battery, ignition/safety switch or poor battery cable connections No Start (Engine Cranks) symptom with no dtcs - ANSWER componant/system Anti-Theft Devices Fuel/Ignition/Computer Intake Air System Exhaust System Base Engine possible cause Fuel system disable, incorrect key, lack of network communication Low fuel pressure or volume, no spark/weak spark, defective CKP sensor, loss of network communication, high TP sensor voltage Restricted intake or leak in induction system Restricted exhaust system Incorrect valve timing, no or low compression Slow Return to Idle symptom with no dtcs - ANSWER componant/system Vacuum Leaks Throttle Body Intake Air System Leaks possible cause Cracked or dislodged PCV or other vacuum hoses Binding throttle plate, broke throttle return spring Leak in induction system Fast Idle or Runs On symptom with no dtcs - ANSWER componant/system Base Engine Fuel/Ignition/Computer Intake Air System possible cause Engine overheating TP sensor, leaking injector(s), excessive fuel pressure, advanced ignition timing, incorrect heat range spark plugs Vacuum leak Low/Slow Idle or Stalls/Quits during Deceleration symptom with no dtcs - ANSWER componant/system Base Engine Fuel/Ignition/Computer Intake Air System Automatic Transmission possible cause Incorrect valve timing Low fuel pressure or volume, incorrect ignition timing, idle speed too low Induction system leak Defective torque converter clutch Backfires symptom with no dtc - ANSWER componant/system Secondary Ignition Fuel Delivery System Base Engine Exhaust System possible cause Misrouted ignition wires, cracked distributor cap, moisture in distributor, carbon tracking Low fuel pressure or volume Incorrect valve timing Exhaust leaks Lack of or Loss of Power symptom no dtcs - ANSWER componant/system Base Engine Fuel/Ignition/Computer Intake Air System Exhaust System Brake System Automatic Transmission Supercharger System Turbocharger possible cause Variable camshaft timing system, incorrect valve timing, low compression Low fuel pressure or volume, throttle linkage, accelerator pedal position sensor/TP senor, dirty or faulty MAF sensor, EGR system, check fuel trim, and VPWR PIDs Restricted air filter, induction system leak, vacuum leak Restricted exhaust Binding or dragging wheel brake(s), stuck parking brake