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Changed out spark plugs, distributor cap, rotor, even switched around spark plug cables. What is the next step to clear code ?

Vehicle: 1999, Jeep, Cherokee, 4.0L straight six

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P0302 Misfire number 2 cylinder

Leak down test, you would need to rule out a mechanical condtion, A leak down test is much better in identifying the problem than a compression test.

 A leak down test is more accurate that doing a compression test, where a compression test misses a leakdown test identify

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