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What is the cylinder compression supposed to be on a 1991 explorer v6?
Wiki User
∙ 16y ago
Don't know what it is supposed to be but I had mine checked because I thought that I had one low. All 6 cylinders were between 145 and 150 psi and my engine is in good shape. I turned out that one of my spark plug leads was leaking. I do know that all cylinders should be within about 10 - 15psi of each other.
Wiki User
∙ 16y ago
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