Multiple error codes on 2005 4.0 TJ

[Choochoobig]

Good morning Ladies and Gents,

I have another new to me jeep tj It is a 2004 4.0l 5 speed
It started limiting my rev level at 3 k
I took it to local auto parts and put it on their scanner, the codes came back as:
PO300 - multiple cylinder misfire
PO301- cylinder 1 misfire
PO306- cylinder 6 misfire
PO351- Ignition coil
PO463- fuel level sending units volts too high
So i bought :
a new coil pack
6-new plugs
cam position sensor
crank position sensor and a new fuel pump.
after two days working on it,, it is doing the EXACT same thing, it ides fine and when you run through the gears, 1st is fine I don't rev it out, second when you get at 3k it cuts out, shift into 3rd good power until 3k, 4th gear good when you roll on and off the throttle, 5 on the highway, lower rpms its fine,,, just cant get past 3k rpm. Am i missing something easy?
im open for discussion

 

[macleanflood]

Other methods using newer scanners but here's the gist of the sync procedure you need to do. Are you on your original OPDA?

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-Mac