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What could be the problem if on a 1996 Honda Accord engine acts like its not getting enough fuel but only when car is doing about 40mph at 1800 rpm in 4th gear with an automatic transmission?

- Fuel filter: A clogged fuel filter can restrict fuel flow to the engine, causing it to run lean.

- Fuel pump: A weak fuel pump may not be able to deliver enough fuel to the engine at higher speeds.

- Fuel pressure regulator: A faulty fuel pressure regulator can cause the fuel pressure to be too low, which would also lead to a lean condition.

- Oxygen sensor: A bad oxygen sensor can send incorrect signals to the engine's computer, which could cause the computer to lean out the fuel mixture.

- Throttle body: A dirty throttle body can also restrict airflow to the engine, causing it to run lean.