driving down road car bogs down lose power then burst of energy then loses power later

Dont play that guessing game... Have it 'professionally' scan tested!!

I think your car is doing what mine was just a while ago. My car was losing power and lurching when pulling a steep hill and had a sort of hiccup when driving. Ended up being my Mass Air Flow sensor. I'd suggest buying a dealership replacement part because the run of the mill replacements at auto part stores go bad quickly and will be more trouble than they're worth.