I have a check engine light to I had it tested and I got back p301, p303, and p304. As well as a random misfire code. So I have a misfire on cylinder 1, 3, and 4. What is causing this? I always get a check engine light for misfires after I go mudding and I didn't the last time I went but the next day when I started it up in the morning I had a check engine light. I thought nothing of it until I started driving and it was a flashing check engine light. So I pulled over and shut the jeep off, waited a bit, then turned her back on and it was just a normal check engine and has been since then. Any ideas of what this could be?

 

if it only happens when you go mudding then something got wet that was not suppose to. I would look at the plug for the coil pack and the cam position sensor on the block. As well as the grounds in the engine compartment.

 

It only happens when I go mudding but it usually goes away after a day or two. This time it's been stuck in for like 2 weeks. I'll check those things. Thanks