I have swapped a 1.4 ej9 to a 1.5 vtec and it will not start the green key light is flashing from an immobiliser problem which I have had the immobiliser removed any ideas as I am lost off what to do.

 

Not clear on what happened.
You swapped in a 1.5 engine in. But, you took off the immobilizer off the engine??

If the new engine had an immobilizer then the ECM that came with the engine
it is looking for the signal from the immobilizer to say it is okay to start.
The ECM will not let the engine work without the proper signal from the immobilizer
You will either need to reinstall the immobilizer and have the original key
Or, you will need a new ECM that will run the engine without an immobilizer signal

Are you using a new ECM or the old ECM with the new engine?

 

welcome to the forum. when you got the 1.5 engine, did you also obtain the complete wire harness and ecm needed for the swap.