Issues for 5 months

Hi Everyone. I am having problems with my 2011 Jeep Grand Cherokee Overland 5.7L 2wd. Here are some past problems - https://www.jeeps.net/threads/saying-hi.3690/page-4#post-34063
And https://www.jeeps.net/threads/p0339-cam-and-crankshaft-sensor-problems.3691/

So basically now the spark plugs have been replaced and all OEM. The car rides even rougher now in that 60-75mph range. Had the tires checked and I’m told those are good and not a problem. Tire shop guy said he thinks the vibration is coming from the back of the car and recommends drive shaft.
I believe it is more engine related and it sometimes drives smooth and other times it is rough. If you drive it for 10 minutes on the highway...it is definitely noticeable. Since spark plugs have been changed I can feel it more at slower speeds.
It was originally brought in to the dealership because it was stalling and throwing P0339 codes - Camshaft and Crank sensor. (Problem was still present before those were replaced)
So after changing those sensors out 5 times they sort of have it not throwing a code. But still just not right.

Any Thoughts or Help would be appreciated!

 

I thought it was rpm dependent and happening at about 1600-1750 rpm. After the plugs changed it seems to be happening at lower speeds also now. It used to be only noticeable at that 55-75 point...but now I believe it is even in the 35-55 sometimes. Sometimes smooth...sometimes a little off and like it’s skipping. Shaking more now after this spark plug change. (Or I think anyways). It just seems like it has to do with the fuel or spark.

 

Did you see my message?

 

How does that not answer your question? I told you the rpms? I said exactly what it was doing...

 

I thought it was rpm dependent and happening at about 1600-1750 rpm. After the plugs changed it seems to be happening at lower speeds also now. It used to be only noticeable at that 55-75 point...but now I believe it is even in the 35-55 sometimes. Sometimes smooth...sometimes a little off and like it’s skipping. Shaking more now after this spark plug change. (Or I think anyways). It just seems like it has to do with the fuel or spark.

that is what I responded

 

W

well - now the engine light is back on. So this makes the third time they gave it back saying it was fixed and then after 200-400 miles it is failing. I don’t know what the most recent code is...but the first one was a P0339 code.
In answer to the dif oil being changed - I do not know. I just purchased the car used at 91,000 miles about 6 months ago.

 

I

What can all relate back to a Cam and/or Crankshaft sensor being thrown?

 

Today I brought in to dealership to read scan why the engine was on. They pull it in and say the code cleared and they didn’t have anything. Engine light was mysteriously off.
I drive home and no light. My wife goes to work (10 miles and 2 hours later) and engine light comes back on and for some reason the seat belt light is flashing - so she unplugged and plugs back in and still flashing. Weird.
she did have her purse on the passenger seat...but I don’t think that is it.
The strange this is - before all these problems occurred a flashing battery light and airbag light was on. The first fix was an alternator and PCM.
So I’m deducting that everything is somehow all related.