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Discussion Starter #1
my astra mk3 gsi 2.0 16v is idleing at 1200 constantly,i saw one split in the sfi box to inlet manifold rubber gasket,as i was putting a power cap on i thought it would be solved,but its still the same....any ideas????
 

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My old Corsa SRi did this and i took it back to vaxhall 3 times before they fixed it, it was the potentiometer.
not sure if it will be the same for you?
 

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something else, potentiometer is throttle position sensor. i think it should read 0.8v throttle close and slowly go up to just under 5v fully open.
 
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