If you have access to a scan tool you should be to see your short and long term fuel trims. This is an indication of how much fuel the PCM is trying to add or remove in order to maintain an appropriate air fuel ratio. I guess the main inputs would be the MAF which is on the tube just after the air box. This can be cleaned with the appropriate cleaner. The other side is the first bank of O2 sensors. Poorly flowing injectors can restrict flow and cause the PCM to compensate. Closer to zero on the long term fuel trims would indicate the PCM is not having to compensate from the original factory settings.
If it were mine, I would check the fuel trims, clean the MAF, add a couple of bottles of gumout cleaner (or whatever brand you prefer) in the tank to clean the injectors and see if it improves once you have finished the tank of fuel. Those are the simple things I would try before I dug deeper. Hope it helps and you can get it fixed
If it were mine, I would check the fuel trims, clean the MAF, add a couple of bottles of gumout cleaner (or whatever brand you prefer) in the tank to clean the injectors and see if it improves once you have finished the tank of fuel. Those are the simple things I would try before I dug deeper. Hope it helps and you can get it fixed
