ASE A8
ASE A8 – Engine Performance
More study resources
Cheat sheet
Keep the key ideas within reach.
ExploreKey terms
Get comfortable with the vocabulary.
ExploreStudy plan
Give each week a clear focus.
ExploreCommon mistakes
Understand the traps and how to avoid them.
ExploreCase studies
Put your knowledge to work in context.
ExploreExam-day guide
Prepare for the day ahead.
ExploreAbout this exam
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. Preparation should follow the official ASE path: ASE publishes study guides tied to the certification test series, offers an official practice test program and a free test drive, and lists test preparation and training resources, accredited training providers, and test center locations. ASE also documents test requirements, work experience requirements, testing options including online remote testing and the ASE Flex Test, ADA accommodations, Spanish testing, and renewal and recertification processes. Candidates should confirm current A8 test specifications, including length, time limit, passing score, and fee, directly with ASE before scheduling.
What you'll study
About ASE A8 preparation
What exactly is the ASE A8 test?
It is one of the automobile certification tests in the ASE certification test series. ASE describes certification as proven technical knowledge in the automotive industry, and states that ASE certifies automotive service professionals across the country. A8 focuses on engine performance diagnosis and repair rather than mechanical overhaul.
Where do I find the official A8 test specifications?
From ASE directly. The ASE site links an All Tests page and the ASE Certification Test Series page, which host the study guides. Those pages carry the authoritative content list and current test details; third-party summaries can be outdated, so verify anything numeric against ASE before you schedule.
How long is the test and how many questions are there?
ASE publishes these details with the specific test and its study guide on the ASE Certification Test Series page. This page does not state them, so treat any figure you see elsewhere as unverified until you confirm it on ASE's own pages.
What score do I need to pass?
ASE does not publish the passing score on its homepage, and it is not restated here. Check the official study guide or the All Tests page for the current scoring information, and review the ASE FAQ section on test results for how scores are reported.
Can I take A8 remotely, and in Spanish?
ASE lists Online Remote Testing with its own policies and procedures page, plus Testing Options covering available delivery methods. ASE also lists Spanish Testing. Review both pages before registering so you know the equipment, environment, and identification rules that apply to your chosen format.
What are the work experience requirements?
ASE maintains a dedicated Work Experience Requirements page and a Test Requirements section in its FAQ. Requirements differ by test and by pathway, so read those pages rather than relying on what other technicians tell you. The ASE Certification Pathway page explains how the pieces fit together.
If I fail, how soon can I retake it?
ASE addresses test results and retake rules in its FAQ sections on test results and test requirements. Policies on waiting periods and re-registration are set by ASE and can change, so confirm the current rule there before you pay for another attempt.
How do I keep the certification once I have it?
ASE lists Recertifications & Renewals, the ASE Renewal App, and an FAQ section on renewals and recertifications. The Renewal App is one recognized route; the standard renewal process is the other. Confirm which option your certification record is eligible for through myASE.
What is the best study order for A8?
Start with the official ASE study guide for the test, then work through the official practice test program and the free test drive to find weak areas. Follow up with accredited training providers or ASE Campus courses. Study guides, practice tests, and training are all listed under Test Prep on the ASE site.
What trips up candidates most on engine performance?
Engine performance questions are diagnostic, not recall-based, so the common failure mode is jumping to a component before confirming the fault with a scan tool reading, a fuel trim value, or a measured signal. Practice explaining why a reading is out of range, not just what part to replace.