ive converted my s2 to gotech i have a fiesta turbo throttle body but no throttle cable yet so i have to rev it by hand, it runs ok but when you touch the throttle it misfires and if you let the butterfly close it stalls. is there a throttle stop on the throttle body or is there an idle control valve on it? also the base map i have is for a 1600cvh and my car is bored to around 1650 would this affect the way it runs?