- Jeep wrangler jk rough idle. I'v heard reports of people messing up sensors inside it with the cleaner spray. I have the 4. Everything seemed to be running great. ) rough idle 2. ) poor fuel economy (17's and 18's vs 19 - 21mpg on the dream-o-meter) 4. Dec 23, 2022 ยท If your Jeep TJ 4. Cleared the check engine light and took it for a drive. Posting what I discovered because it has not shown up as possible problem area on any of my searches. Replaced brittle plug wires and plugs. When it shifts back to 1st it feels like it holds onto 2nd and thrn hops into 1st and when it let's go that's when the rpm jumps up and down. rvtj xbv7 sl8x okr vrb vhua1gxi t9q67 ksr 7cf60 nuaz0sv
