So for two weeks now my 96 4.0 has had issues accelerating. When it’s cold there’s virtually no issues. Generally any heavy throttle will feel like it bogs down the engine and causes it to hesitate. This gradually gets worse the longer I drive it at one time until the point where I can barely give any throttle before it won’t rev up any more. We’ve had the transmission checked, replaced plugs and wires, replaced the throttle position sensor, and upstream O2 sensor. I’ve gotten the code P0171 for lean engine, and codes for misfires in cylinder 1, 2, 3, and 6. Any input would be great appreciated.