those are still the factory parts. I regularly use fuel tank injector cleaners
I use the bottles of injector cleaner bout every 4th tank but they have never been out of the car to be cleaned. Discovered yesterday that the car runs perfect till it warms up. then starts the same hesitation and it is apparently going to do that until it has sat overnight. only runs good till it comes up to operating temp. There is a little temp sensor on the water pump, I am going to replace it 1st since its easy to get to. It might need a fuel filter as well its been about 60k since it was replaced. Injectors are for sure a concern though with the milage on this car. Thanks for the help.