Lost power no smoke. I have the stock lift pump stock sticks tst. Some days it runs better than others and I get a slight haze after pulling for a couple of hours.
i also a slight miss so slight that know one would even know.
-lift pump?
-overflow valve?

this is an 03 555 with 99000 miles on it

 

Get the fuel pressure tested , drain a little fuel from the filter into a glass , let sit for an hour , to see if there are any thing's else than fuel in there , change fuel filter .