this may seem very odd to you guys but you know when you are accelerating and you flip on your AC and you car bogs down a bit will latley when i am accelerating it will often feel like the car is restricted just a bit and sometines it will just all the sudden get a tiny burst of power like the AC was turned off (this whole time the AC is off) ...i called the honda dealer asking about new spark plugs and they said that the plugs will last about 100,000 miles, and my Civic Si only has 48,000 miles on it...so then i called my local mechanic and he said that sometimes the plugs can wear out at aobut 50,000 miles if the car is driven hard but it is unlikely...the new plugs are $20.00 each and i was wondering if any one you had any good advice