05 sonata 2.7 v6 stuck in limp mode
 

started just running rough and stalling sometimes ran fuel injector cleaner through it, started smoking changed air cleaner installed new spark plugs ,it idled better but it started staling then I got maf code so I cleaned the maf sensor it still got the code so I installed a new maf sensor the it went into limp mode I un hooked the battery to reset the ecm seems to be stuck in limp mode it keeps coming up with misfire code on2 4 and6 cylinders please help

That is usually normal after running some sort of solvent / cleaner through PVC system (through PVC valve), throttle body, MAF sensor. I've had this occur many times after cleaning above mentioned items with Seafoam Cleaner & Lube spray. Usually the rough idle and smoke from carbon deposits (through exhaust), work itself out after driving a few miles. If CHECK ENGINE light comes on, that usually goes off after a few miles as well. If not, you may have forgotten to re-attach a vacuum hose or electrical connector.
PLEASE NOTE: Do not use Seafoam Spray Cleaner and lube on MAF sensor. Only use cleaner specified for MAF sensor. I use CRC MAF sensor spray cleaner.