My 04 just turned 1600mile and im having fuel or spark problems i think. At low idle it seems to be starving for fuel. Taking of from stops etc.unless your on it.then cruising at85 top gear has a sputter between 4000 5000 rpm.no leaking hoses redid pc3.i tried stp fuel injector cleaner no help checked fuel pump filter screen it was clean.should i change the plugs? Its driving me nuts and seems to be getting worse. Im pretty sure i got some bad fuel the day it started but that was 3 tanks ago fuel injector cleaner didnt seem to work.any ideas what it could be???