car missfire before boost and worse when cold
 

hi all my car has just had engine rebuild but when i put engine back in i timed it to tdc so wouldnt start now sorted it but when the car is started from cold it missfires really bad but when it boost its fine also missfires abit when warm but no where near as bad and it still only does this before boost i was thinking maybe its a bent valve but im also thinking temp sensor because the plug has broke so i have had to fit it buy wire like this http://i263.photobucket.com/albums/i...8/scoob025.jpg and im thinking maybe if the wires are around the wrong way this could cause this any one know would it cause this to happen and what way the wires should be around:cry: