Despite of the earlier advice, reconsider at least whether you want to go to that same dealership again or try someone else. They are always the very expensive way to fix things, and not always the quickest/most efficient way for people who can do something themselves. See yourself, they already diagnosed that you have a faulty MAF. But when you changed it, it did not help (I assume you reset the fault codes, that is something you must do because adaptive values by the original MAF remain in computer unless you reset them or do multiple long driving to make the computer learn new values). So they would then have continued to replace other parts to find the defective one. And after a while your car may work again but you pay a lot.
By the way, did they do other recalls than the harmonic balancer? There are some more, e.g. a fuse connector/cable needs to be changed. And the newest, the high pressure ABC line is subject to recall. A good dealership should always check all the outstanding recalls and perform them or tell the customer that they checked those and all are OK.
I do not believe your problem is due to a clogged fuel line as that should more or less be OK in idle but cause huge hesitation problems for the engine to rev up. But your fuel filter needs to be changed, it is due anyway. It may contribute if it is extremely dirty, or if the built-in fuel pressure regulator is failing. Changing it is a DIY job, the filter costs less than $40.
With a good OBD II reader you can read and reset the codes yourself. Better ones would tell you also more, e.g. if the fuel mixture is lean or rich and that would help in diagnosing the problem.
