did you ever test the continuity of the green wire from the fuel relay to the coil?

although it does look like a component issue as it runs with the suppressor linked out,

on a side note a m8 has a complete mk4 cabby hes breaking if you need any little bits for yours, hes keeping all the running gear etc but theres a set of clocks in it plus some panles and trim, only in iwade so local