Quote:
Originally Posted by nubbzcummins
The most efficient thing to do would be to shut the engine off so no fuel is being burned.....The safest thing to do is leave the motor running so you can steer easier saying you have power steering.....Most newer vehicles when coasting down hill in gear with very low load will actually go into fuel cut which means that the motor is still running but no fuel is being injected. This can be seen with an air/fuel monitoring device. and a scan tool or something similar to monitor load. I have no clue if the older vehicles do this as well.....The down fall to coasting in gear is that the vehicle is slowing down vs not slowing or actually gaining speed when in neutral. So will you slow down too much to make it over the next rise? So you see this can get quite involved.....Cd, Can you make the car think that the brake is pressed at all times so that you can start up on the go vs having to stop?
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Have you ever lost your power steering at >30MPH? There's no need for power steering when you're moving. It was invented for scrawny kids in parking lots.
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