Apologies if this is repeated info for everyone - I've done a few searches with various bits here and there regarding remotes and locking but I think my problem is a bit more specific.
I bought a Ford Focus 1.8 2000 Zetec, which came with a Remote Key and a spare (blue) key. The remote key would not work remotely but could start the car ok.
After changing the battery on the remote and giving the unit a bit of a clean I decided a new remote was required, so after a few searches here and there I purchased a new remote key, connected the key section of my faulty remote to the new remote, reprogrammed it (4 turns of the ignition, then pressing the unlock button on the remote at the bong signal) which worked to the extent that I can now open the car remotely.
However one unseen side effect is that the remote key will now not start the car. My spare blue key will, so my assumption from this is that the signal from my remote key is not recognised by the immobiliser.
This is concerning because I a) have to use the remote to open, then remember to use the blue key to start the car and b) I now cannot create new replacement keys as I need two keys to reprogram. Weird thing is that I haven't come across anyone with this issue - I've obviously done something wrong!
Any advice gratefully appreciated.