ASE A8 case studies
ASE A8 · Put your knowledge to work in context.
ASE A8, Engine Performance, is one of the automobile certification tests in the ASE certification test series administered by the National Institute for Automotive Service Excellence. ASE describes its certification as verifying that automotive service professionals have proven technical knowledge in the automotive industry, and states that ASE certifies automotive service professionals across the country. The A8 credential is intended for working technicians who diagnose and repair driveability, computerized control, ignition, fuel and air induction, exhaust, and emissions concerns - the systems a vehicle's powertrain control strategy depends on. Candidates typically sit for A8 alongside other automobile tests such as Engine Repair, Electrical/Electronic Systems, and Advanced Engine Performance, because driveability complaints cross all of those boundaries. The ASE A8 case studies are 5 cases and about 5,106 words.
1Rough Idle and Misfire on a 2.4 L Four-Cylinder: Which Test Decides It
2016 four-cylinder sedan, 2.4 L, 104,000 miles. Complaint: rough idle with a MIL that flashed briefly and then went steady.
910 words, about 5 min2Both Banks Lean on a V6: Fuel Trim Pattern Versus the MAF Suggestion
2013 V6 pickup, 3.5 L, 138,000 miles. MIL on with P0171 and P0174.
1,116 words, about 6 min3Intermittent Misfire Under Load on a Coil-On-Plug V8: A Flawed Swap Test
2019 V8 sedan, 5.0 L, 63,000 miles, coil-on-plug ignition. The driver reports the MIL flashed for about 20 seconds during a highway merge and then went out.
1,000 words, about 5 min4P0420 and P0430 on Both Banks: The Customer Wants Converters Today
2015 V6 crossover, 3.6 L, 152,000 miles. MIL on with P0420 and P0430.
967 words, about 5 min5High NOx Only on a 2006 Four-Cylinder With Fresh Catalysts
2006 four-cylinder, 2.4 L, 178,000 miles. State emissions test results at 25 mph: HC 88 ppm (limit 220), CO 0.4 percent (limit 1.2), NOx 1,610 ppm (limit 937).
1,113 words, about 6 min