I have this carzy problem.Ok, first, my car has like no pickup anymore, when i stomp on the gas it doesnt pick up like it used to. it just goes. then, sometimes it will start to spitter,spatter,sputter, and then die in the middle of the road! it almost sounds like something is dropping or something cause its like not wanting to go cause then when it happens and i try to step on the gas it will do it worse. also, if i put it in nuetral and slam the gas it will quit. but right after i put new spark plugs in it started making this weird noise from the back three plugs like someone saying siss repeadetldy.any idea whats going on? could it be a dead cylinder or a bad spark plugs?should i change the spark plug wires cause they are still stck i havent changed them yet. or maybe its because im a little over due on an oil change. any feedback right now would be a miracle because my poor baby z24 is sick and i want to fix her!!