random misfire

So, in my ‘02 Tj 4.7L stroker, I replaced my plugs with Bosch Double Platinum. Suddenly I’ve developed a misfire in cylinders 3 and 4. Along with a random misfire detected. The coil rail is almost 6 years old. Everything I’m seeing online says replace the rail. Thoughts?

Hello everyone, I have a 1998 Jeep Wrangler 4.0L, I have a check engine light on and it’s giving me the following codes: P0300- multiple/ random cylinder misfire P0301- cylinder 1 misfire P0302- cylinder 2 misfire Anyone know what my issue may be? Been trying to fix this on my days off from...

2004 Jeep Wrangler 4.0 Hello guys, first time ever posting in a forum so I'll jump right into the issue. In the past week it's been below 0° in the mornings, when I start my jeep on the cold mornings I get a misfire out of cylinder 2 and 3, once the engine warms up it seems to run fine, maybe a...

Lookin for some input from the gurus! 06 jeep tj sport 4.0 auto, 23k original miles - Inherited 2 years ago and have been tracking a P0300 random misfire from day 1. Only happens on cold start/first start of the day, runs great otherwise (although power seems like it should be better, not my...

Back story, I bought an 06 Rubicon 6spd from a local with a misfire issue for a reasonable price. I'm no stranger to jeeps or the 4.0 engine either. 200k miles, look to be all road miles, PO was surprised on the test drive when I got the diff lock lights to come on... This condition exists...