-i have recentley changed my astra 1999/t engine.
-it is now getting no spark or fuel
-its sensors, ecu, central locking are all good (checked)
-i have reused all the old sensors, flywheel, pullies ect because they were good
-there is no spanner light on the dash as i heard would be with a immobiliser problem
-also no engine or immobiliser codes
-i am stuck
please advise what to do - what can it be?