So I got these codes right now, car runs but won't go past 3rpm (restricted performance)
Wondering what do I need to replace, Where do I start?
Anyone had these codes before? If so what did you replace first?

 

This is the 98’ - 03’ X308 section. You need the 04’+ X350/358 section.

 

I agree with A2B's response; however, the answer to your question is YES !!!. There are a couple of current threads on the subject in this forum and if you search "P0300 codes" you'll get another 75 to read through on what we've experienced with the 4.0L engines.

 

...And we really don't need pictures of your code reader.

 

I'll makesure not to next time, apologies.