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Old 4th January 2008, 20:04   #10
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Interesting.

I still can't see how the locking and immobilser are related. It's not any sort of functional relationship, so it must be something odd like earthing or power supply if it is related at all.

Honestly, there is really no working involvement with immobilser and locking. And the fact that the car turns over backs up that the immo is OK, it wouldn't even turn over if it was unhappy. I'll photograph the inside of my spare key to show you the two unrelated parts, if you like.

There is a pattern, but try to avoid falling into the trap of fitting the symptoms to what you think it is. Take a step back, and try to see what other clues there might be.

Glow plugs: if these aren't working typically it would be cold starting that's a problem. Failure to start after the MOT probably rules this out.
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