Inline spark plug tester for cars – user-friendly tool for testing spark plugs in cars and small engines, helping diagnose ignition problems quickly and accurately. Compact spark plug tester with two holes – small, two-hole design for convenient testing; includes a car test probe (Kfz-teststift) to test and diagnose the ignition system in your vehicle. Ignition coil tester – in addition to testing spark plugs, can be used to test other automotive components, providing versatile diagnostic capability. Auto ignition tester – includes a spark plug gap measurement device to verify and maintain the correct spark plug gap, supporting optimal ignition performance and acting as an ignition coil tester. Use scenarios: - Diagnose misfire, hard starting, or ignition failure on a passenger car or small engine. - Verify new or replaced spark plugs and ignition coils during maintenance or after repairs. - Check and adjust spark plug gap to ensure proper ignition for improved efficiency and reliability.