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Hi new to this forum.

97 Lantra 1.6 glsi

Have not had long and developed this problem - Idle steady at 1200rpm at cold start but when warm hunting between 1000 and 1800 revs.
Looked on here and saw others had had same problem and removed ECU fuse for an hour whilst also cleaning the battery posts and terminals wich were minging.
Replaced Battery connections then ECU fuse and the car alarm promply went off !

Have tried shutting all doors/tailgate/bonnet locking unlocking to no avail, alarm keeps sounding off.

Pulled fuse for alarm and still keeps going, and engine starter dead.

there is an immobiliser flashing to right of steering wheel on dash, have touched the immobiler fob to it but makes no difference.

Any help gratefully received.
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