Hi not had this problem on my 300tdi but I have had issues with that exciter wire. Basically it may be worth your while following the wire back in the engine bay, if it's same as mine it goes across the front of the engine and then back along the driversside of the block and joins up with a bunch of other wires, they are likely to be taped together and possibly have a plastic cable tidy thing
Nov 27, 2012. #3. Tim_W said: Hello Everyone, I have searched the forums, picked the brains of my local Land Rover dealer and tried several repairs and still no luck. I have a 1998 Defender 300 Tdi with a factory fitted immobiliser and no alarm. I have been experiencing problems with the immobiliser on and off for a year or so.
The engine has done 132,000 miles and I thought it was running quite well. I'd not expected to notice much of a difference but I've been really surprised - in a good way.. It seems that when the belt was last changed the modified 300Tdi timing kit wasn't installed (although it should have been) so I still had the original 1995 bearings, pulleys
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