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We have a 99 with the straight six engine that has done the same thing since almost new. After replacing many electrical parts the dealer tells us it is sticky valves. To cure this the head would have to be rebuilt. We have been adding a pint of Marvel Mystery Oil in the fuel tank and the engine oil with every oil change and it seems to do better.

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Q: What can cause 1994 Cherokee to misfire when hot runs fine when cold?
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