alright i bought my 2000 contour with 27k on it and it now has 37k on it, it wouldnt start in a parking lot because it was way overdue for a fuel filter (so i found out), before it died it was fighting for power, when i slammed on the gas which i later deduced was because the filter was clogged, well now i have replaced it and it runs almost perfect, except sometimes when i hit the gas hard it still feels like its fighting for power, could i just need fuel injector cleaner and some gas treatment? or could the fuel filter not have been the entire problem?