Secondary coil resistance kΩ 1.2 - 1.8 . All of the circuits can be tested without having to unplug the Coil-On-Plug ignition coil. These coils are called windings. The primary winding gets the juice together to make a spark and the secondary sends it out the door to the distributor. In this test, you pass a small electric current through the wire and measure resistance with an ohmmeter. Use of any coil that is not compatible may damage the MSD and void the warranty. Moss Motors Tech department shows you how to test your coils Ohm rating. Carburetor You can test the resistance of the coil using a voltmeter and measure the Ohms (resistance) across the +’ve and –’ve terminals. at 3,000rpm °BTDC 37 at 8,000rpm °BTDC 37 . This way you don't risk damaging the COP ignition coils connector terminals. The low resistance helps to produce up to 45,000 V. Flame Thrower II coils have lower resistance, 0.6 ohms for use with Ignitor II ignition systems as well as many other high-energy ignitions. If the spark plug ignition cables are getting faulty, it will have a much higher than normal resistance which causes additional voltage to be generated by the ignition coil … If a spark plug or plug wire is open or has excessive resistance, the ignition coil's output voltage can rise to the point where it burns through the coil's internal insulation causing a short. Primary coil resistance Ω 160 - 200 . Ignition coils are made up of two coils of wire situated on top of each other. The Ohmic resistance of the coil is about 0.2-3.0 Ohm primary and 5-20 kOhm secon-dary. In this case, the following method is helpful: Connect a voltmeter in series between the secondary winding of the ignition coil and a battery. A standard coil should read around 3 Ohms or around 12 volts What will make this possible is if you use a wire-piercing probe to attach to your multimeter leads. The winding ratio of primary to secondary winding is 1:100. If the coil is intact, the resistance is a measurable number in the order of 2,500 to 5,000 ohms. Note: If a high-voltage diode is built into an ignition coil to suppress sparks, it is not possible to measure the resistance of the secondary coil. The insulation in many coils can be damaged if output exceeds 35,000 volts. One winding is the primary winding, the other is the secondary. PET-9000 Parameter #1 357 #2 07 . Pole shoe air gaps mm(in) 0.30 - 0.40 (0.012 - 0.016) Ignition timing at 1,000rpm °BTDC 34 . Also, mount the coil so the coil wire is as short as possible to keep resistance low. Circuit Descriptions Of The C-O-P Ignition Coil Connector. It's impractical to uncover the coil and examine the wire; fortunately, there's an easier way to find a break -- a continuity test. The technical structure can vary, depending on the ignition coil‘s area of application. To find out for sure, use a multimeter to check the voltage on the positive wire of the coil with the ignition on. 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