I have a 2000 pontiac grand am 3.4 liter i recently changed my front breaks and i understand new pads smell a little but i drove it on the freeway and at one point i had to push break pedal all ths down to stop what did i do wrong? Also it kind of overheats temp goes 3 notches above normal temp but never fully overheats once i start moving it cools down just want to fix small issue before it gets worse any advice would be great. One more where are the other spark plugs only 3 are visible in front and how do i get to them?