Hi Tony, As Tony S has said, scope the primary to the coil, or at least make sure that you have NBV to the coil whilst cranking. Also as Tony said, check for tightness of mems pins in the plug, but also inside of the mems ECU, as these do sometimes come adrift (but do not always show as fault when tested). If these are ok, then re-fit plug and fit cable tie and pull plug into mems unit nice and snug! The main relay (wedge shape) as mentioned will also play a part in non start situations. Finally check engine to body/battery earths for clean/good connections. All the best mate, Gunner.