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I have an 03 EX auto, and I am having some sort of problem with it. It doesn't get into overdrive veryoften cause I an stationed on a very small island. When I travel up hill and it is wound out for a while it starts to act up on me. It will start to lose power and hesitate, if I hit the gas it will knock and ping really bad. I can't understand it. Does anyone know what it might be? Sorry, it has been a while since I have been in here.

 
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You should turn your overdrive off unless you're on a highway. If you're in OD going up a hill the transmission should down shift automatically but it sounds like yours isn't. Sometimes automatics can't sence a load change and will stay in a higher gear even though it should be in a lower gear, and sometimes you really have to stab the throttle so the trans will downshift automatically. Its basically like have a manual trans in 5th gear going up a hill, the engine will bog down until you down shift into a lower gear. Next time you're driving up a hill and the engine starts to knock and ping, shift it manually into the next lower gear.

 
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The problem isn't that it is staying in overdrive. It is still in third gear! I am thinking something is heating up and making the car freak. I talked to a mechanic today and he thinks it might be this crap fuel we have here. I will find out next week, I am going to hook it up to a computer.