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HybridZ

Engine speed jumps up when driving


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Finally got my 1977 280z running and ready for the road, but have an idle problem. when the car starts it idles at 1000 but as soon as i start driving the rpm jumps up to 2100 and does not drop again untill i stop. Once it hits 2100 it stops climbing, but will not drop unless i stop. If i am moving, and out of gear it runs at 2100, and if i put it in gear, and no gas, the car will push untill it hits 2100 again. Please help, what do i have to change?? Thanks

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