Started running rough, engine misses

2006 JEEP CHEROKEE
81,000 MILES • 3.7L • 6 CYL • 2WD • AUTOMATIC
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WILLIAM NOTTURNO
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Started running badly. While installing new plugs, which were way overdo, I found the old plugs worn to the point that the gap was .070+, except the number four. It still looks fairly new but was wet with gas. After installing new plugs it still has a miss and i smell gas (no leak found).
Jul 21, 2017 at 12:09 PM
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STRAILER
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Hello,

On the number four plug lets remove the spark plug and do a compression test.

Here is a guide to help you get the job done. If you do not have a gauge the auto parts store will rent it to you for free.

https://www.2carpros.com/articles/how-to-test-engine-compression

and

https://www.2carpros.com/articles/engine-vibration-at-idle

Please run some tests and get back to us we are interested to see what it is.

Cheers, Ken
Jul 22, 2017 at 12:31 PM