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Shorting out coil pack

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Old 10-22-2012, 08:53 PM
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Default Shorting out coil pack

Am tryin to diagnose possible rod knock but it's got a coil pack so to disable each cylinder one at a time can I use a test light to ground out the clip and break the wire with the needle of it and disable that cylinder. Will this work to help me find if I have rod knock?
Old 10-22-2012, 10:33 PM
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Any other ways to tell if I have rod knock?
Old 10-23-2012, 12:45 AM
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I'd take a used plug and break the ceramic off, then screw it in before I'd short out the coil pack.
Old 10-23-2012, 02:32 AM
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Shorting it at the plug shouldn't hurt it.
But you'll probably ruin the boots.
Or unbolt it - move it away 6", then make a set of 6" plug wires to connect the rail to the plugs.


But why not just disconnect each injector one at a time - easier.

Last edited by rrich; 10-23-2012 at 03:20 AM.
Old 10-23-2012, 07:00 AM
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Originally Posted by rrich
Shorting it at the plug shouldn't hurt it.
But you'll probably ruin the boots.
Or unbolt it - move it away 6", then make a set of 6" plug wires to connect the rail to the plugs.

But why not just disconnect each injector one at a time - easier.
Your a damn genius lol
Old 10-23-2012, 07:13 AM
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How would you "disable" a cylinder? The pistons will keep going up and down regardless of spark and fuel, just won't make power, right?
Old 10-23-2012, 08:15 AM
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Exactly right. It will go up and down just not with as much force so in theory it should stop making noise if there is a problem with that cylinder
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