engine compression. at best the timing is shot, at worst the block is trash. either way, the dealer should have fixed it as best they could. there is a (very very slight) chance that it was like 2 year old gas and that the lines and shit had water condensation, but that is pretty much like 1000 to 1 and it wouldn't cause the lack of "oomph" when you gunned it. one way or another, the compression isn't there. if it was just a timing issue, the dealer would have fixed it and doubled the value of the car. most likely, the block is cracked or the head gasket is in pieces or the cylinders are warped away from circular. any one of these things is probably a terminal (ie: totaled by insurance standards) problem w/ the engine, and you will never see over 60-80 horsepower from it.
as someone who buys and resells cars from auctions at least 4-5 times a year, and has done so for a few years, i'd avoid purchasing that car like woah.
what...
the...
fuck...
that ish would break so fast and cost you $1000 to have the dealer hit a reset button for you. oh heeeeeeeeeeeeeeeeeeeeeell naw. get that digital riff raff away from me. my dashboard needs to look like this; simple and sexy.
also balancing that disk there was a bitch, lol.