ok i need advice. took the side panel off, got the old plug off, installed my new SB and i have no throttle. i verified the connections were all the way connected but no response. i took the SB back off and replaced the original connection and i have throttle - BUT now i have the Check Engine light on. what did i do?? will this cause a check engine light? is my SB bad? i'm lost. i'm not much of a auto mechanic but i thought i could do this as it's a 'plug-and-play' upgrade. any advice please...