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check the plug & plug wires make sure you have spark, what cylinders arent firing, easiest way to tell is start it up, and feel exhaust manifold to see what cylinders are firing or not should be hot... if no spark then replace wire, may be bad coil or dist

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12y ago
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Q: Why aren't all cylinders firing on my 1989 S-10 2.5L 4 cylinder?
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