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I just added a scangauge to my 2002 Saturn Vue. In neutral it shows the throttle position as 1. As soon as I put the car in drive the TP goes to 2. When sitting at a light, you can see the MPG drop steadily about .1 MPG per 15 seconds when in drive. In neutral, the MPG drops .1 per 30-40 seconds. The instant mpg indicates approximately 50% higher when coasting in neutral than in gear.
Jay
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