# 2007 Jeep Wrangler Unlimited - Misfires **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** jeep\ **Created:** [August 10, 2022, 7:32pm UTC](https://community.cartalk.com/t/2007-jeep-wrangler-unlimited-misfires/185735 "2022-08-10T19:32:06Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![wayne05](https://avatars.discourse-cdn.com/v4/letter/w/e9bcb4/32.png) [@wayne05](https://community.cartalk.com/u/wayne05)\ **Post date:** [August 10, 2022, 7:32pm UTC](https://community.cartalk.com/t/2007-jeep-wrangler-unlimited-misfires/185735/1 "2022-08-10T19:32:07Z")
2007 jeep wrangler with 3.8 bogging down and missfire on highway then clears up then comes back .also sluggish with no power then back to normal ---
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [August 10, 2022, 10:07pm UTC](https://community.cartalk.com/t/2007-jeep-wrangler-unlimited-misfires/185735/2 "2022-08-10T22:07:40Z")
First step, ask your shop to check the diagnostic computer for p-codes. None? Then my guess is either a problem with the ignition system or the catalytic converter. If this happens only when engine is hot, and you feel lucky, you could try replacing the crank position sensor on a flier. Best bet though is to start w/ a proper shop diagnosis. ---
**Author:** ![weekend-warrior](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/weekend-warrior/32/26122_2.png) [@weekend-warrior](https://community.cartalk.com/u/weekend-warrior)\ **Post date:** [August 10, 2022, 10:19pm UTC](https://community.cartalk.com/t/2007-jeep-wrangler-unlimited-misfires/185735/3 "2022-08-10T22:19:52Z")
A lot of things can cause this. Is the check engine light on? if so, post the codes.