car sputtering and backfiring under full throttle

Hi, my name is Devin. I am an auto repair expert with the Car Genius team here at RepairPal. So sorry to hear you're having trouble with your vehicle. If your Accord is sputtering and backfiring under full throttle even after changing the coils, spark plugs, and injectors, the issue might be related to the fuel system or air intake. A clogged fuel filter or weak fuel pump could cause insufficient fuel delivery under heavy acceleration. Also, problems with the mass airflow sensor or oxygen sensors could affect the air-fuel mixture, causing backfiring. Another possibility is a timing issue with the engine, where improper timing can cause misfires under load. If you need more advice, have any other questions about your vehicle, or would like to get connected to a RepairPal Certified shop near you, we have you covered. Give us a call at 877-913-1554, and we will happily help you out!