Yes, a EGR and a MAF sensor can be bad without throwing a code!
The MAF sensor is what sounds like could be your problem with the extra rich gas going in the engine it could burn up the convertor, could cause the hesitation on hard excelleration and the bad gas mileage. Check that and for vaccum leaks first.
You can take off the EGR and clean the ports and see how it goes, you can also take off the MAF and clean off the wires with qd contact cleaner, dont use your hands.
Friday, March 26th, 2021 AT 9:51 AM