2006 dodge dakota 4.7 showing codes random/multiple cylinder misfire.

Im getting the code that says random / multiple cylinder misfire I change the spark plugs and automatically they fouled out turned all black I was thinking it could have been maybe the gas pressure regulator so I checked for PSI and I was sitting Ed around 62 PSI running in about 56-58 when I turn the key to the on position and would not drop pressure so dont think there are any leaks now I'm thinking maybe mass air flow sensor I'm getting spark and all the coils any advice would help thanks

First order of business is to find out which cylinders are misfiring. I know the code description says 'random' and 'multiple', but that doesn't mean the miss is random OR on multiple cylinders. I'd suggest a power balance test at idle to ID any dead or weak cylinders.

Because you found the new plugs to be black, I'd check fuel trims on both banks. Black would suggest you're going to find negative trims. A screenshot or photo of your trims at idle and 2500 would be fantastic.

There is no MAF on this engine. Speed density only. If possible, look at (and save) the freeze frame data for the P0300.