Well after a very long day and plenty of Merlot.... I'm too ****ed to think properly - except to say that your cam sensor would clearly have read a different pattern to your "known good" car,so the fault should have been obvious then.
Take it easy on Sassanach, his car has a very elusive fault that has had many hours of checking and testing done,with no clear answer coming forward as yet.

Hmm probably but on the scope of old, very very old as i was too tight to buy a new one, they did look and Quote " i said almost identical " LOL but clearly they were not anyhow its all good now.
 
Did you try to unscrew your THROTTLE POSITION SENSOR from car when engine is running ?
I have exactly the same problem in my Gems now.
 

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