OBDResource Automotive Spark Plug Tester Engine Ignition Spark Plugs Tester Analyzer 0 to 6000RPM Car Motorcycle Spark Plug Testers Tool for 12V Gasoline Vehicles Dual Holes 13MM Spark Plug Socket

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Must Have: Engine struggles to start,poor acceleration and even increased fuel consumption abnormality?Then spark plugs may be having issues or just check news park plugs,need this engine spark tester test the spark plug is good or bad performance,and judge whether the spark plug need to be replaced,offering enhanced efficiency compared to traditional inline spark testers Why Dual Hole :With two slot,this spark plug tester can test and compare the performance and ignition spark intensity of the two spark plugs at the same time,make an accurate judgment the condition of the spark plugs and replace the broken spark plugs for better engine performance in time.It saves time and you save the cost of replacing a good spark plug if you use this tool Simulating Engine Ignition System:By rotating the switch to adjust the spark plug tester frequency from 0 to 6000 rpm. The higher the frequency, the stronger the spark intensity. It can truly simulate the engine ignition system. More effective measurement process,more accurate measurement results Plug and Play:Place spark plugs into the slot of the tester and insert the black board then connect the power plug and rotary switch to adjust the frequency to turn on the tester with indicator light and two high-voltage signal indicators on,observe the spark plug spark performance Upgraded Version:It adopts enhanced resistance high voltage coil pack and chip to supply more steady power to spark,good heat resistance and impact resistance and can extend its service life.Equipped with black board to see the spark more clearly(Test in dimmer spots, effects pop more) Longer spark plug also apply :With 13MM diameters spark plug tester socket,can test spark plugs insulator diameter within 13mm.If less than 13MM or the spark plug is too long, place shims on sockets before insert long spark ,can work normally Wide Application: The spark plug tester is essential for testing and troubleshooting 12V gasoline automobiles car motorcycle crankshaft engine with spark plug insulator diameter within 13mm,a must have diagnostic tool for any individual,professional mechanic garage and auto shop NOTE: It may be not suitable for testing short plugs on lawn mowers, chainsaws, or most small motors(Spark plugs aren't included in product !)