I recently couldn't start my 2000 Accord 4 cyl and it was my spare key that was the problem! I swore that I used it once before but now I think it was just to open the door to get to the real key inside. Being a mech. Engineer I started going about it the complicated way but never opened the owner's manual! Doh! Couldn't even get advice at honda-tech.com. Thank you for the help guys. Saved me a lot more head aches.