Is coasting downhill with the engine OFF harmful to the drivetrain?

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#21

11-09-2014, 06:13 PM

GeorgeL

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Join Date: May 2014

Location: SoCal, CA

Posts: 1,545

Quote:

Originally Posted by DArkk

Yep. When I was driving the Tahoe rental it had a V8 engine so when going on fairly flat road the display would report which mode the engine was running at: V4 or V8 so it was going V4 most of the time. It changes mode automatically depending on power needs. Pretty cool way to save fuel.

Unless you owned a Cadillac with a V8-6-4 in the '80s.

Virtually every EFI system turns off the injectors when the manifold pressure is low, the throttle closed, and the RPMs significantly above idle. If they didn't do this emissions would go up as the mixture wouldn't burn effectively.

#22

11-09-2014, 11:26 PM

kenji815

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Location: Walnut, CA

Posts: 293

Wow this thread is so wtf

#23

11-10-2014, 07:11 AM

n9cv

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Join Date: Apr 2012

Location: Hebron, In

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Quote:

Originally Posted by NotBlake

100% confirmed that the FI shuts off when you let off the throttle in the 2015. You can hear the injectors stop firing and the CVT shifts into the tallest possible ratio that will still keep the engine spinning at a safe speed to restart the firing.

YOU ARE CORRECT.

I took our 2011 Fit down to the gas station tonight. From 40 mph I left off of the gas and it did not return to an idle rpm. I coasted for two blocks slightly down hill and it did not return, so it is indeed slightly engine braking.

I was wrong on my previous statements as they pertain to the Honda Fit.

#24

11-10-2014, 10:42 AM

Fit Charlie

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Steering wheels that lock... Must be an automatic transmission "feature."

#25

11-10-2014, 12:13 PM

andre181

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Location: Nebraska

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My EXL CVT's steering wheel doesn't lock. I think I remember reading in the manual the push button models don't have a wheel lock.

#26

11-10-2014, 12:56 PM

Wanderer.

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The wheel shouldn't lock with the key in ACC position...

BUT

Still an unnecessary thing to do, and I think bad for the CVT, since no pumps are running. I also think you only have emergency brakes, one or two powered pumps before you lose vacuum. Like has been said, the injectors shut off when coasting with no throttle anyway.

Also generally illegal.