• ⚠️⚠️ WARNING:This inline spark plug tester (fits 12V GASOLINE engines) WILL NOT WORK with SHORTER(Under 1.34 inches) spark plugs. If you're unsure, CONTACT US IMMEDIATELY at [kzyee_support@1_6_3.c_o_m]–we'll resolve your issue within 24 hours
• 🤔 ENGINE TROUBLE? QUICK SPARK PLUG TEST: Hard starts? Weak acceleration? Rough idling? Skyrocketing fuel costs or black smoke? Your spark plugs are the heartbeat of your engine. Our quick spark checker tool reveals the culprit in minutes. Keep your ride smooth and efficient - because even small parts make a BIG difference
• SIMULATE ENGINE OPERATION: spark checker tool(0-6000RPM adjustable working frequency) are designed to simulate the full spectrum of engine operating conditions - from idle speed (low RPM) to high-speed/heavy-load scenarios (high RPM) - rigorously testing a spark plug's ignition reliability, spark intensity, and long-term durability under extreme operating conditions
• SAVE 50% TIME & DOUBLE PORT SPEED:Compare two spark plugs Instantly, fix faster.Test and analyze two spark plugs simultaneously in real time – the side-by-side comparison instantly highlights weak performers, letting you pinpoint issues and execute targeted repairs with confidence. Built for pro-grade accuracy while cutting your diagnostic time in half
• NO SETUP, JUST GO: Our ignition coil tester delivers true PLUG-AND-PLAY simplicity: just insert the spark plug into the test port, secure the safety shield, power it up (works globally with 100V-240V), and adjust the frequency—no complicated setup or tools needed. The transparent safety shield lets you visually confirm performance in real-time while staying protected. Perfect for pros and DIYers who want instant results without the hassle
• DUAL-SAFETY SHIELD: Engineered with a shock-proof transparent guard that blocks electrical hazards while you test, our ignition spark tester features smart Auto-Start Technology—it ONLY operates when fully sealed, ensuring OSHA-compliant safety and error-proof diagnostics. This safety-driven design protects your hands and vehicle’s ignition system, making it the ultimate must-have upgrade for risk-free precision in every garage
• FIT 99% 12V GASOLINE ENGINES: Never second-guess compatibility again! Our Spark plug tester and coil tester compatible with ALL 12V gas engine spark plugs— cars, SUVs, pickups,RVs, motorcycles and more. No guesswork, no adapters. Slash downtime and costs with precision testing for any vehicle brand or model. Effortless, reliable, built to handle your garage’s diversity. Get it once, fix it all

• Package Dimensions ‏ : ‎ 6.93 x 5.35 x 2.52 inches; 13.44 ounces
• Date First Available ‏ : ‎ March 27, 2025
• Manufacturer ‏ : ‎ KZYEE
• Country of Origin ‏ : ‎ China