disingage the emulator wiring after that make the original connections which were before cng.
then chk the problem.
if not, then get out the fuel pipe connected 2 the injector rail, hold it facing upside and ask someone 2 start the car, the fuel pressure must be awsome, i mean it shud go 2 a great height, then the fuel pump is ok. after that, chk the injectors and then the compression.
regards