The not starting could be that you havnt put the pipe on right, if the pipe is off then there will be an issue with the engine not pulling fuel right. Though i wouldnt have thought that would stop it running as it should still fire on one cylinder at least.
You didnt accidentally knock any electrics when you were routing the sucktion pipe over the ECU?
Quite an odd one, as if it is imobilized or kill switch on etc mine wont even turn over!
