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The AFM has been opened before by the last owner, I have always suspected that it might have been the cause behind the running rich, a problem I've had since I got the car. I have check the CTS it seemed ok, was at around 1500 at cold and went to around 500 when the engine was warmer.
I have the car booked for a service at discovery auto next week though so I might put off doing anything else at least until then. Thanks again for the tips.
I did a goofgle and found a test procedure here. I have not looked at it as you have to register.
3.5 V8 Flapper system Diagnostic Manual - LR4x4 - The Land Rover Forum
Regard sPhilip A
a bit of useless information , i had the altenator fail lately on my disco wich caused no tacho signal and battery lamp. the battery got that low on charge that it wouldnt run anymore if i hit the brake or put it in reverse or had the lights on... just food for thought,
what was the outcome of this mate?:)
would love to know the outcome mate?