Hey guys. I have a misfire problem. I have these engine codes

P0300 multiple misfire
P0301 cylinder 1 misfire
P0302 cylinder 2 misfire
P0303 cylinder 3 misfire
p0305 cylinder 5 misfire
P0306 cylinder 6 misfire
P0455 o2 sensor problem

Now it isnt constantly misfiring. I usually notice it after driving on the trail for a while, engine temp 100°c and I stop the engine, wait a few minutes and when I start it up again it misfires at idle, enough to shake the jeep a bit. But when I give it some gas and start driving again it goes away. Plugs are fairly new within a year and a bit. I dont visually notice anything with the coil pack other than it being a little dirty. I have an 2001.

Where the hell do I start.

 

From your description of when it happens the misfire sounds like hot soak vapor lock.
Isn't P0455 a large evap leak?

 

Yeah I read something about that. How can I fix it?

You're right about 0455

 

Check for vacuum leaks at the engine itself. cracked hose ends, split lines etc.