How to test an ignition coil - Guide

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  1. How to test an ignition coil - Guide 
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    This testing procedure is valid for most automotive coils. Using an ohmmeter, check the resistance between the side terminals of the coil. Do this with all of the wires to the coil disconnected. You should see 0.75 to 0.81 ohm of resistance. Then check the resistance between either side terminal and the center high tension terminal. The reading should be 10,000 to 11,000 ohms. Any significant deviation from these numbers would indicate that the coil is defective.

    See attached picture for further info
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    Boostist, do you have any info on how to test individual coil packs?
     
     

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    Quote Originally Posted by A20 RYM View Post
    Boostist, do you have any info on how to test individual coil packs?
    Same principle mate

    Testing Coilpacks

    and then here

    method
     
     

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    Cheers mate
     
     

  6. Help with Ohmmeter 
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    Can I ask you to point out where the correct settings are on my multimeter and where should I put the - wire, in the 10am or common? I know very little on electrics, as you can see!
    Please see pic of my multimiter, on pic you have the voltage on my battery. Fascinating, isn't it. I only got it for voltage.
    Cheers
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    525e 1976, 2002 1971, 316i 1986, 325i 1992, ?
     
     

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    The Ohms setting is on the bottom left of your dial between 6 o'clock and 8.30. the Ohms setting is signified by what looks like a horseshoe.
    The green setting on the other side of the dial is an ammeter, don't confuse the two although they are the same colour.
     
     

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    cheers

    525e 1976, 2002 1971, 316i 1986, 325i 1992, ?
     
     

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    most bmw misfires are caused by the coils going down, they are a nightmare
     
     

  10. E46 In-line coils 
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    Hi,

    One of my 6 in-line coils has failed. Is there an easy way to identify which one?
     
     

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    Quote Originally Posted by Wadadli Cooler View Post
    Hi,

    One of my 6 in-line coils has failed. Is there an easy way to identify which one?
    Yes, using a pair of insulated pliers pull the coils up one at a time while the engines running and see which has no effect on the running or isn't firing. Otherwise get the fault codes read for the car
     
     

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