Sorry, I don`t speak english. I have two p...

Fritz, Clear codes, Plugs and coils try switching them around, not using the same cylinder, to see if code changes to different cylinder. this would help diagnose bad coil or plug. See links below for full instruction. I have had this code come up because of a bad/dirty fuel injector also. Last link tells what other reasons code could be thrown.
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Chevy Trailblazer misfire DIY diagnosis step one p0301 p0302 p0303 p0304...

Trailblazer P0301 Is the coil bad

P0302 OBD II Trouble Code

Here's a link on your trouble code,301 is cylinder 1,302 is cylinder 2,303 is cylinder 3 and so on. P0301 Jeep Cylinder Misfire Fault Detected

P0300-p0304 misfire on cylinder 1-4
P1399 random cylinder misfire

P0171 System Too Lean (Bank 1)
P0174 System Too Lean (Bank 2)
P0301 Cylinder #1 Misfire Detected
P0302 Cylinder #2 Misfire Detected
P0304 Cylinder #4 Misfire Detected
P0306 Cylinder #6 Misfire Detected

P0300 - Random multiple cylinder misfire
P0301 , 302 and 304 - Cyliners 1, 2 and 4 misfire
P0351 - Ignition coil A primary/secondary circuit malfunction
P0354 - Ignition coil D primary/secondary circuit malfunction

p0300 random multiple cylinder misfire, 301 is cylinder 1 misfire and 302 is cylinder 2 misfire. p0600 is a communication link fault.

you don`t if say if you know but these codes mean misfire on cylinder 1 and cylinder 2.you also don`t say if you tried anything to fix.check out plugs they may need changing,it could be bad ignition wires or dirty injectors,or even dirty valves(not closing completly)causing misfire.you could have low compression on these two cylinders also.

P0301 Cylinder No. 1 Misfire Detected
P0302 Cylinder No. 2 Misfire Detected
P0303 Cylinder No. 3 Misfire Detected
P0304 Cylinder No. 4 Misfire Detected
P0305 Cylinder No. 5 Misfire Detected
P0306 Cylinder No. 6 Misfire Detected
P1346 Variable Valve Timing (VVT) Circuit Range/Performance Fault
P1349 Variable Valve Timing (VVT) System Malfunction
P0330 Knock Sensor
P0446 EVAP Vent Control Fault
P0430 Catalyst System

Stop driving immediately.....

You defiantly skipped on your timing........

Sounds like you may have a misfire. Scanning the computer for codes will help you narrow down the possibilities. If it is a misfire you will see a code or codes similar to P0301 thru P0306 which are specific cylinder misfire codes. P0301 being cylinder number 1, P0302 being cylinder number 2, etc. You can then focus on those cylinders to see whether they are getting spark or the condition of the spark plugs.

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Try the crank pisition sensor that is vary likely to be the couse of your misfires its working but its intermintly shorting out telling the pcm that you have a misfire and setting the codes