Question about Jeep Wrangler
Two things come to mind.
1. Spark plug wires that are shorting out to each other. Firing a plug is easier in open air. under compression it has more resistance and so is more prone to jumping to ground or to another wire that is not under compression.
2. Possible burned head gasket between 3 and 4 would also cause your symptoms.
3. Vacuum leak on that side down by 3 and 4 on the intake manifold.
Check for leaks and then to further narrow it down we need a compression test. If the compression test is normal then try a new set of wires. If that still doesnt fix it then go back to looking for the vacuum leak. Might even be an intake manifold gasket.
Posted on Apr 27, 2010
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Posted on Jan 02, 2017
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