Quote:
Originally Posted by meseville
Can the reading be slightly over 1.7 Mohm and still be good? 1.875 Mohm?
Bob
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Dont' worry about exact numbers in Ohms, the bullet-proof method is comparing the coil resistance to a healthy coil resistance. For instance, if one coil goes bad, it will give you different ohmmeter readings compared to others. Little trail and error will pinpoint failed coil eventually.
Also, when you buy a brand new coil, CHECK it again and compare to any healthy coil that is already on your car- they should read same readings. Beleive it or not, I bought a defective coil at O'Reiley a year ago and decided to test it just for fun, and it showed OPEN circuit, meaning, when the ohmmeter leads were reversed, it showed "infinite", test every electronic component that you buy from autoparts, they are selling defective stuff sometimes.