Can we fix it

Unless the service being performed is done under a recall a dealer is not likely to perform free or discounted service. Looking at the list of items you have already installed on your vehicle some items are normal maintanance. As for changing the crank sensor, tps, map seems like you are replacing parts hoping to find the problem. If the car is turning over but not starting first thing to check would be if there is fuel and spark. I'm all for people saving money by doing their own work but sometimes the cost of having a dealer/repair shop find and fixe the problem is cheaper than changing out a lot of different parts. As for Oreilly and advance ordering parts from the same supplier. There are only so many manufacturers of parts so most auto stores do use the same venders. This is typical of other industries as well.

if want to solve permanatlly throw 2.7 intrash buy 3.2or3.5 every peice will interchange exept exhaust down pipes from mani folds ucan getem cheap problem solved for a 2.7 is straight up a peice of promise i have built 82 of these engines for car lots in south georgia area most with less than 40.000miles have not seen one yet that wasnt shut down due engine oil beeing cooked to a sludge causeing major damage the 3.2or 3.5 swap is the best answer i found yet can b done in a 2day period case closed best way look wrecked low mile dodge with these engines use every thing it comes including computer it all comes out one big peice