EOC on the highway, some questions

[Burnt]

Originally Posted by Christ

There is mention on this site in several threads about the proper shifting technique and clutch starting for manual transmissions. If you're unsure about how you're currently doing it, I suggest you read up and avoid a head ache.

Before I started doing EOC I read everything I could find about it on this site; I didn't even know manual engines could be clutch started. I spent some time in a parking lot practicing before I felt comfortable with it on the road. I have noticed some increases, although it's only been one tank so far with regular EOC. I just saw that thread about engine damage from EOC and I got a little worried, which prompted me to make the thread.


Robertsmalls is right, each time I turn the ignition off all my electronics etc cycle off/on too, which is kind of a pain. I am planning on having a kill switch installed this summer, once I can scrape some money together (I know squat about mechanics, so I don't think I could install one);

[Christ]

Originally Posted by Burnt

Before I started doing EOC I read everything I could find about it on this site; I didn't even know manual engines could be clutch started. I spent some time in a parking lot practicing before I felt comfortable with it on the road. I have noticed some increases, although it's only been one tank so far with regular EOC. I just saw that thread about engine damage from EOC and I got a little worried, which prompted me to make the thread.


Robertsmalls is right, each time I turn the ignition off all my electronics etc cycle off/on too, which is kind of a pain. I am planning on having a kill switch installed this summer, once I can scrape some money together (I know squat about mechanics, so I don't think I could install one);

Well, the engine damage, from what we can tell, is caused by fuel dumping. You won't have that trouble at all, no matter what engine speed you shut down at.

If you can do basic maintenance, and know how to use a wire crimper, you can probably install a kill switch without too much drama. The hardest part is the research, believe it or not. If you need help when you get around to doing it, there are plenty of people here, myself included, who are more than willing to help you out to the best of our ability.

The basic idea behind a kill switch is to stall the engine. There are a few ways to do that, but some of them aren't safe. If you kill the ignition only, you end up with fuel dumping. Same thing with choking it out. Really, you should kill the fuel. That way, the ignition system keeps working and ignites whatever is left of the fuel that already made it into the engine, so you're not pushing raw fuel out your exhaust.

Only conceivable problem with injector cuts on an OBD-II vehicle (yours, for instance) is that you might get a CEL if you cut the injectors directly w/ the switch. It should go away immediately after restarting, though.

[ranterc]

I'm new to this and having a little troble finding a definitive answer as to we
ther eoc is safe or not in my aoto yaris,, most of what I'm reading is leading me to believe that engine off is harmful to the auto trans,, ?

What about coasting in neutrrel with engine on?

[comptiger5000]

Coasting in neutral with the engine running is fine, as it keeps the tranny pump turning, so everything is lubed.

EOC varies by tranny. Some autos will lube well enough when spinning freely with the engine off, others won't.

[PaleMelanesian]

I believe the Yaris is one you should NOT eoc. Engine-on neutral coasting is fine.

[MadisonMPG]

What about my Dakota? It has a "thunk" when I put it back in drive from neutral... this is EOnC, not EOC.

[Christ]

Originally Posted by MadisonMPG

What about my Dakota? It has a "thunk" when I put it back in drive from neutral... this is EOnC, not EOC.

You probably have a bad engine/transmission mount.

[brucepick]

Re. coasting with an auto tranny.
Look in your owners manual re. having your car towed.
Look in the section on "Flat Towing", where all four wheels are on the road and turning.

Most manuals should tell you whether it's safe, and limitations on distance and speed.

The reason to read that section is - flat towing an auto-tranny car is essentially the same as engine-off coasting it. Wheels are turning and the engine is off, with trans in neutral.

Some car's manuals will say never do it, always have the drive wheels off the ground. Some manuals will say you can go up to 30 mph or 40 mph, and for a distance of x miles. You get the idea. Now they're assuming the car is being towed so they probably figure you do it rarely. If you're using it as a driving technique - that will be daily, or nearly so. You might want to limit your coasting to lower speeds and distances than the manual gives you. Tranny failure is expensive indeed.

Better yet, buy a stick shift car next time if you're able to drive it!

[ranterc]

Originally Posted by brucepick

Better yet, buy a stick shift car next time if you're able to drive it!

I couldnt connvince the wife to learn

other wise i've always preffered mt's even before i started trying to increase mpg's