ASE A1 Engine Repair Workbook — General Engine Diagnosis | 120 Questions, Quiz with Key | Free Course on YouTube

General Diagnosis is 40% of the ASE A1 Engine Repair exam — and the section this workbook drills the way the test asks it: the diagnostic process, no-start sorting, leak tracing, noise and exhaust evidence, vacuum and compression testing, leak-down, PCV, and tool-based diagnosis, page by page alongside the free ASE Prep Lab Module 1 course on YouTube.

The full ASE A1 video course is FREE on YouTube — search "ASE Prep Lab" (@ASEPrepLab). Print a page, watch the lesson, and write as you go: the diagnostic flowchart, the leak-down path map, the vacuum-gauge reading set, and the compression pattern chart — then prove it with the check questions built into every lesson page.

WHAT'S INSIDE (44 pages, US Letter PDF)
• 13 follow-along lesson pages (M1-1 to M1-13) matched to the free video lessons
• 120 original ASE-style practice questions (64 lesson checks + 56-question module quiz), Technician A/B formats included
• The module's course diagrams printed on the lesson pages — cover the labels and name each part before you check
• Score-by-topic sheet that shows exactly which lesson to restudy
• Complete answer key for every question, with rationales and ASE task citations

Built entirely from ASE's published A1 task list — every lesson names the tasks it covers. Print-ready in black and white; also works on a tablet with a stylus.

PLEASE NOTE: This is a study aid, not an ASE product. Built from ASE's published A1 task list. Not affiliated with or endorsed by ASE. The video course is free on YouTube (@ASEPrepLab); this workbook is its printable companion. Found an error? Message us — corrections post to the course errata and updated PDFs follow.

THE COMPLETE ASE A1 ENGINE REPAIR LIBRARY (ASE Prep Lab)
• Module 2 Workbook — Cylinder Head and Valve Train: https://www.etsy.com/listing/4605352218/ase-a1-engine-repair-workbook-cylinder
• Module 3 Workbook — Engine Block: https://www.etsy.com/listing/4605334979/ase-a1-engine-repair-workbook-engine
• Module 4 Workbook — Lubrication and Cooling Systems: https://www.etsy.com/listing/4605357576/ase-a1-engine-repair-workbook
• Module 5 Workbook — Fuel, Electrical, Ignition, Air and Exhaust: https://www.etsy.com/listing/4605360094/ase-a1-engine-repair-workbook-fuel
• Timed Mock Exams — three full 55-question simulations: https://www.etsy.com/listing/4605361772/ase-a1-engine-repair-mock-exams-3-timed
• Complete Course Bundle — all five workbooks + the mock exams in one download: https://www.etsy.com/listing/4605364070/ase-a1-engine-repair-bundle-5-workbooks
• A1 Practice Questions — the full 300-question packet on its own: https://www.etsy.com/listing/4603032968/ase-a1-practice-test-300-questions-o