Help!

[172mk1 lover]

Mk2 phase 1 is refusing to start!!
Turns over but does not fire.
I have removed relays and cleaned and swapped around.
Checked all fuses.
Changed tdc sensor for another from a working car. ( just ordered a brand new one just in case)
Fuel pump does prime and when cranking it does pump fuel to the rail.
Immobiliser light goes out.

 

[barnesautos]

Have you checked for spark at the plugs yet ?

 

[da rok]

Immobiliser light should be on solid when starting