Testing coils on a coil over plug system?

Ed Wright · 09-12-2011, 02:48 PM

Art, good auto parts stores carry adjustable coil checkers. Very simple. If you can't find one, Snap-On used to carry them too. Their's just cost more. Set the adjustable gap to 40,000 volts. Should have a sharp blue spark. Should hear a snap each time it fires. Sounds crude maybe, but will show up a weak coil in a heart beat. Hook it to the spark plug end of the wire, you may also find a leaky plug wire.

09-12-2011, 02:48 PM	#4
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: Testing coils on a coil over plug system? Art, good auto parts stores carry adjustable coil checkers. Very simple. If you can't find one, Snap-On used to carry them too. Their's just cost more. Set the adjustable gap to 40,000 volts. Should have a sharp blue spark. Should hear a snap each time it fires. Sounds crude maybe, but will show up a weak coil in a heart beat. Hook it to the spark plug end of the wire, you may also find a leaky plug wire. __________________ Ed Wright 4156 SS/JA

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