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Author Topic: Anyone shifting to neutral on downhill to save gas ? Back to Topics
Vibe03

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Toronto

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Message Posted: Jul 21, 2010 9:12:55 AM

When it is not steep downhill and you don't need to brake the car to slow it down, coasting down around 55 mph at idling gives the engine a rest also save gas. Just not sure if the vacuum and other stuff are operating at normal level
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contiki
Champion Author Ontario

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Message Posted: Sep 17, 2014 7:18:00 AM

Never...............
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hoopitup2000
Champion Author Virginia

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Message Posted: Sep 17, 2014 6:37:05 AM

Of course, it's a manual!!
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StArrow68
Champion Author Oakland

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Message Posted: Sep 16, 2014 10:43:31 PM

Hummm, if I had some idea of what to reply to I might try. As noted, in proper circumstances shifting out of gear is not a big deal, for those that are comfortable with it. That is the key.
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redfish67
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Message Posted: Sep 16, 2014 2:16:52 PM

no
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dontuknowOH
Champion Author Ohio

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Message Posted: Sep 16, 2014 9:25:47 AM

"Hard time figuring that out"? Well there is a lack of on the job training?.... No! but proper correction and then a supervised follow up as a benefit for success, repeated if necessary.

Some instructors make it always look easy but the clues often are not transferred correctly, the small knowledge "bits/pieces" follow along more slowly (time). Watch an individual sweeping with a broom.... Some learn some don't but sooner or later the process, it will get done.

Saving fuel is kind of hard, often similar to like eating ice cream after it has melted, for some >>> StArrow68 >>>> (reply)
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twt
Champion Author Virginia Beach

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Message Posted: Sep 16, 2014 6:05:22 AM

Just consider the source, when reading about this practice.
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StArrow68
Champion Author Oakland

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Message Posted: Sep 16, 2014 12:44:43 AM

Hummm..., an idiot? You still have steering, brakes and the ability to shift into any appropriate gear, what loss of control? The engine is at idle, everything is working, why is that folks who don't drive manuals have such a hard time figuring that out?
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stoihor
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Message Posted: Sep 15, 2014 10:45:32 PM

no.
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ace12012
Champion Author Phoenix

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Message Posted: Sep 15, 2014 1:12:36 PM

no.
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twt
Champion Author Virginia Beach

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Message Posted: Sep 15, 2014 10:28:09 AM

Only an idiot, would do that. No control, when the vehicle is in neutral.
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b899
Champion Author Connecticut

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Message Posted: Sep 15, 2014 9:16:39 AM

No
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dchawk81
Sophomore Author Pennsylvania

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Message Posted: Sep 12, 2014 2:23:07 PM

This mechanical system is working as designed, I just forgot. It was never meant to be taken out of gear with cruise activated. It's a 1997 for crying out loud. There's probably even something in the owner's manual about it. Not everything was being made electronic and idiot-proof yet like it is today.

[Edited by: dchawk81 at 9/12/2014 2:26:15 PM EST]
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StArrow68
Champion Author Oakland

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Message Posted: Sep 11, 2014 11:55:46 PM

CC is still part of the system, not something I'd take on the road until it was sorted. Funny thing about one off system failures, sometimes they are followed by something else that is unexpected.
As for putting a car in neutral while on the road, not a big deal for somebody who knows what they are doing.

[Edited by: StArrow68 at 9/11/2014 11:56:39 PM EST]
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dchawk81
Sophomore Author Pennsylvania

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Message Posted: Sep 11, 2014 2:48:19 PM

>>Why do I find it surprising that anyone would drive something that spikes to 5,500 rpm in neutral? As for putting a manual transmission in neutral, not really a big deal.

It never spiked under normal conditions. Just sitting, it'll idle fine for as long as you want. It's not a dangerous vehicle. It only spiked with cruising and popping into neutral and as I posted previously, it was cruise control doing it.

Should have figured that out from the start, but it didn't dawn on me that I always had cruise on when it was doing it.
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dchawk81
Sophomore Author Pennsylvania

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Message Posted: Sep 11, 2014 2:46:15 PM

Yeah it was basically just holding the throttle open and, being out of gear, there was no drag to slow it down. 5500 is the highest I'd let it go, being redline, and I only did it maybe three times total. I don't know if it would have gone beyond or not, but I suspect it would. I don't have a rev limiter as far as I'm aware. My Contour had one and it would top at around 4000.

But even though I figured out it was cruise related and not a vehicle fault, I still don't do it because you don't ever want to re-engage in the wrong gear, and you don't have control over that in an automatic.
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b899
Champion Author Connecticut

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Message Posted: Sep 11, 2014 10:24:43 AM

No
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contiki
Champion Author Ontario

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Message Posted: Sep 10, 2014 7:56:48 AM

Never.........
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Boyrr
Champion Author Allentown

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Message Posted: Sep 10, 2014 6:25:18 AM

saves nothing!
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twt
Champion Author Virginia Beach

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Message Posted: Sep 9, 2014 8:28:18 AM

Stupid, dangerous idea.
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dontuknowOH
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Message Posted: Sep 9, 2014 6:15:45 AM

dchawk81 When you mentioned the 5500 Engine rpms, I thought you were exaggerating just a bit. Probably lucky that the ECM was in control with its Rev Limiter function. A std. tranny probably kissed that off as a Driver error.

With an automatic, well, that tranny was probably in a forgiving mood but would have cursed you out on the next attempt(if possible). saying ....With the cruise on, you actually put your Engine under charge to the governor control/ECM/vehicle travel speed monitoring device.

Standard or automatic tranny was at the midpoint of the engine's energy output power, but you gave the cruise control governor system access to keep your vehicle at a selected travel(ground speed) MPH based.

For example most small utility engines used for home chores >>> Lawn mower, tillers, power generators, chippers, lawn tractors, ETC. these type engines, all have a control operation device governor. A device similar to your automotive vehicle with the CC. option, but less complicated.

The major difference was your automotive cruise device lost control of its monitored travel speed, which is essential to how it controls you engine power energy. Nothing wrong with your system, your vehicle simply dropped in MPH. Speed by your choice to decouple its engine load at the midpoint of its drivetrain, The tranny has select-a-ability. same as cruise control.

The home chore powered devices all have automatic governor controls that are OEM set to stay on and control you device power by only slight interference from the user, some do have a select throttle adjustment or a minor speed tweaking lever, check manual, check routine service tips, keep fuel supply/equipment free from rain/moisture.

Saving gas is a dedicated driver event, find your "Sweet Spot" highway, Steady for any speed routes of less speed, braking, lots of that eats energy/fuel $$ along with low inflated tires, following too close, hammering that go-pedal, Them darn Hills like energy $$ Ha! Like Rocket Fuel! $^$^$^^^ going up!
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dchawk81
Sophomore Author Pennsylvania

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Message Posted: Sep 9, 2014 12:25:53 AM

Well I finally figured out why my car was revving sky high at times when I'd put it in neutral. Cruise was on! It's the mechanical type and apparently it's not programmed to release when the shifter is moved. So it basically just keeps tugging on the throttle, sending the RPMs way up. Duh.
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kinggw23
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Message Posted: Sep 8, 2014 11:10:10 AM

NO
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Floridaman2013
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Message Posted: Sep 8, 2014 10:10:59 AM

NO>
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b899
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Message Posted: Sep 8, 2014 9:09:58 AM

No
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b899
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Message Posted: Sep 7, 2014 6:34:43 AM

no
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Awing1
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Message Posted: Sep 6, 2014 10:47:52 PM

no
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b899
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Message Posted: Sep 6, 2014 10:14:32 AM

no
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dontuknowOH
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Message Posted: Sep 5, 2014 9:02:16 AM

Yep, now/then, I learned about the benefit of gravity way back when I first tipped up my milk baby bottle, nipple downward works "Great" until empty!! Later with feet on the ground and standing was a real Blast when movement started, a few "OPPS" and "OUCHES" then more Great Things as training took over....... Gas! Yey I had that too don't-u-know, like another Blast..... never saved it!
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Gabilondo
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Message Posted: Sep 5, 2014 7:51:51 AM

yes
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contiki
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Message Posted: Sep 5, 2014 7:47:34 AM

Never...........
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dassfg
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Message Posted: Sep 4, 2014 8:11:35 AM

Illegal as well as Dumb idea
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contiki
Champion Author Ontario

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Message Posted: Sep 4, 2014 7:17:21 AM

Never......
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SGLuz
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Message Posted: Sep 3, 2014 11:20:57 AM

No
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badbobKY
Veteran Author Lexington

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Message Posted: Sep 3, 2014 8:03:11 AM

no
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StArrow68
Champion Author Oakland

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Message Posted: Sep 3, 2014 7:16:01 AM

Why do I find it surprising that anyone would drive something that spikes to 5,500 rpm in neutral? As for putting a manual transmission in neutral, not really a big deal.
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GLM4205
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Message Posted: Sep 3, 2014 5:35:40 AM

Not advisable with an automatic transmission.
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dontuknowOH
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Message Posted: Aug 31, 2014 5:56:40 PM

The 5500 RPMs could result to leaving the cruise control on, or a very dry/worn go-pedal linkage system. That would need checked, some vehicles often need EMg. brake cables lubed, if driven in Winter Sloppy regions on a regular basis. Some find that those Park Brake cables can seize(hang-up)when least expected.

Driving with cruise on is risky during any slippery road conditions, slimy fallen leaves, mud slides, frost/ice/packed snow/wet grass debris on roadways all pose a problem with cruise on if sever amounts go unnoticed.

Your throttle return spring may need checked for wear/tension/binding if engine RPMs build to 5500 gravity doesn't change with the tides where I live anyway, Actually I did have a runaway throttle on a motorcycle once, a Skyrocket event! at that...."1968"
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dchawk81
Sophomore Author Pennsylvania

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Message Posted: Aug 31, 2014 12:09:31 PM

No because sometimes my RPMs will skyrocket. I don't know why but it doesn't always idle down to save gas, and there I am dangerously popping the tranny back into gear with the engine at 5500 RPM.
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redfish67
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Message Posted: Aug 31, 2014 12:08:28 PM

no
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b899
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Message Posted: Aug 31, 2014 10:10:36 AM

no
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PaylessKY
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Message Posted: Aug 29, 2014 10:09:08 AM

No
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b899
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Message Posted: Aug 29, 2014 9:06:05 AM

no
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WEDDY
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Message Posted: Aug 27, 2014 9:43:07 AM

No
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b899
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Message Posted: Aug 27, 2014 8:50:37 AM

no
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pt1KY
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Message Posted: Aug 26, 2014 8:34:31 PM

no
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PnnyPnchr
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Message Posted: Aug 26, 2014 12:00:06 PM

Not advisable with an automatic transmission.
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lyanMI
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Message Posted: Aug 26, 2014 11:25:58 AM

I did it recently.
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Awing1
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Message Posted: Aug 26, 2014 11:10:08 AM

no
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b899
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Message Posted: Aug 26, 2014 8:27:50 AM

no
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dassfg
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No
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