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2007 Jeep Commander Questions

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A P0300 diagnostic code indicates a random or multiple misfire.

I have a 2007 Jeep commander 4.7 V8, with 10300 miles. The Random miss firing just recently started, we started by putting the fuel injector cleaner in it. Nothing happen. Then we replaced the spark plugs to make sure that was not an issue, while doing that we check the fuel injector, “Autozone said it was most likely the fuel injectors,” and looked new. Once completed the light turned off, that same day the check engine light came back on for random miss firing P0300 code. The next step I took was to take it to a jeep dealership service shops. Paid the $125 for the to diagnosis it P0300 code to figure out what exactly it was. They say it was to lower O2 sensor change that was causing the problem. We change both of those. That Didn’t fix the issue either. Today Contact the jeep dealership service center and they said that I would have to repay the $125. Need some suggestion on what do to nexts. Help pleases?
Engine buck/misfire at all speeds, no fault codes. Poor fuel performance. Replaced most sensors on engine, no improvement.
It makes a knocking noise. I have had my tires rotated and balanced, but it still makes the noise.
What needed:
Trans Lines leaking
Trans Flush
4 x 4 Service
Tune up services are due
Front & Rear Differential

Service Code reads:
0 miles to service
Trying to find best repair for vehicle that woun't take advantage or make unnecessary repairs or problems?
Shifted from reverse into drive quickly without pressure on the accelerator. Unfamiliar grinding noise and lurch motion prior to acceleration. First time occurrence.
While driving, car will have no acceleration and be stuck at 40 mph randomly. If I pull over, turn car off, wait a few, then it may work. It seems that it wont downshift while this happens. Happens more when travelling up very little inclines. Been is shop many times. Could this be a filter repair?
My check engine light came on and I did a engine diagnostic and these three codes pop up..p0133,p0137,and p0430 is this a big problem to fix?
car misfiring ,not running on all cylinders
replaced spark plugs a couple months ago, but did not replace ignition coils
My daughter took my vehicle off roading now it makes a grinding sound when making turnd plz help
My car will all the sudden shift into 4tb gear and stay there, it will jerk/slam the whole car
fuses are good
new bulbs
tailgate light operational
Tiene encendida luz check engine
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