How can I check the COP's and see which one is miss firing? I have a meter, just don't know where and what I am measuring. Thanks.

 

trial and error? or pull them out one by one check the resistance in the COP with a voltmeter if u know how to use one

 

Thanks, great input.

 

good luck.. with it im gladd i still have coil packs.. so much less problems and so much easier to trouble shoot

 

It is unlikely you will find a problem with a high voltage coil using an ohmmeter. Most coil related msefire problems are a result of insulation breakdown under high voltage. Since your ohmmeter only applies about three volts to the device under test (coil), you will never see a high voltage insulation breakdown problem. You did not mention a CEL or a trouble code so I assume the misfire is not frequent enough to set a code. Look for other methods posted on this site to isolate the defective coil. I like the coil substitution method best. Purchase one coil and install it in cylinder #1. If the vehicle continues to misfire, then the coil you removed from cylinder #1 is good. Place the old coil removed from cylinder #1 into cylinder#2. If the misfire is cured then coil #2 was the bad coil. If not take the old coil removed from cylinder #2 and install it on cylinder #3, etc, etc until the defective coil is located. Before you purchase a coil, how are your spark plugs? Also, it is possible that the boot on the coil is breaking down under high voltage. The boot is available for about $5 -$6.