What's the best way to find a dead cylinder?

What's the best way to find a dead cylinder?​


See which one is coming up "Short" >

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Usually it's the back cylinder up against the firewall (farthest away from the radiator). That cylinder will run warmer than the rest and those piston rings on that cylinder will wear out sooner, causing lower compression in that hole.

By the looks of the #6 spark plug not burning clean, yep that's your weak cylinder.


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