kill switch

[brutus450]

what do you think of this: My dealer said to keep the kill switch in the "kill" position if you are going to turn the key on and not start the engine. He said otherwise the fuel injectors would pump fuel into the cylinders that wont be used and end up in the engine case.
Makes sense but does it actually work that way?

 

[spyryder]

No way....it needs a signal from the crankshaft position sensor to trigger the injectors. If the crank isn't turning the injectors won't open.

 

[brutus450]

thanks Spy! :2thumbs: I thougt it was kinda weird

 

[Roaddog2]

buts it's good to shut everthing you own down with your kill switch anyway everthing I own is how I shut down then use the key :spyder:

 

[brutus450]

"Y" is that roaddog?

 

[NancysToy]

buts it's good to shut everthing you own down with your kill switch anyway everthing I own is how I shut down then use the key :spyder:

:agree: Best to develop the habit of hitting the kill switch first. That way in an emergency, if you need it, you don't have to think about it.
-Scotty

 

[brutus450]

:agree: Best to develop the habit of hitting the kill switch first. That way in an emergency, if you need it, you don't have to think about it.
-Scotty

AHHHHH...............that is a good point:thumbup:

 

[LDFIREWORKS]

THANKS FOR THE INFO:2thumbs::2thumbs:

 

[Roaddog2]

"Y" is that roaddog?

Scotty just did a great job explaining it .you might need the crank sensor to shoot the gas but at least with my HD when ignition on fuel pump goes on and pressure is there so maybe thats what your wrench was refering to :thumbup:

 

[Spyderman62]

There is actually several more factors that go into the formula to decide when and if the injector opens or not - yes ignition is one, and so is the crank trigger indicating the crank is actually turning, so is the map sensor and the O2 sensor and the call from the ecu to tell the injector to open and so on - simply leaving the kill switch on when you turn the ignition on will never allow fuel to be sent into the combustion chamber. Applies to any fuel injected vehicle - yes Harleys also.....the fuel pump priming is simply one of almost a dozen or so steps in a sequence of preparing the engine to start. Getting into the habit of turning off the engine with the kill switch is probably not a bad idea, good habits allow for the safe operation or control of any equipment. Although from my experience in the world of responding to various vehicular crashes ( I don't believe in accidents as they all have a cause) the one aspect I can tell you is that in the event of a crash where the rider and bike or car become separated, turning off the engine never happens until someone like myself arrives on scene. Usually the tilt or bank angle switch has already shutt off the engine a fraction of a second before it grenades itself. Ok so... I have rambled long enough, just wanted to add my 2 cents worth.

 

[brutus450]

thanks for the replies everyone:bowdown:

 

[tatt2r]

you guys are soo smart i'm glad i bumped into this site ...

 

[tnfleming]

thanks for the replies everyone:bowdown:

More education needed, sorry. What's the point of a kill switch? What emergency scenario can one paint in which it would be best to kill the engine instead of braking and/or swerving? Do you have power steering/ ABS if you hit kill switch?

 

[ataDude]

More education needed, sorry. What's the point of a kill switch? What emergency scenario can one paint in which it would be best to kill the engine instead of braking and/or swerving? Do you have power steering/ ABS if you hit kill switch?

Runaway engine... stuck wide open... for one... several different ways it can occur... most likely would be a frayed "open" and broken "close" throttle cables.

Another... catastrophic brake failure... shut engine down, downshift and use engine compression to stop.

.
.

 

[bone crusher]

There is actually several more factors that go into the formula to decide when and if the injector opens or not - yes ignition is one, and so is the crank trigger indicating the crank is actually turning, so is the map sensor and the O2 sensor and the call from the ecu to tell the injector to open and so on - simply leaving the kill switch on when you turn the ignition on will never allow fuel to be sent into the combustion chamber. Applies to any fuel injected vehicle - yes Harleys also.....the fuel pump priming is simply one of almost a dozen or so steps in a sequence of preparing the engine to start. Getting into the habit of turning off the engine with the kill switch is probably not a bad idea, good habits allow for the safe operation or control of any equipment. Although from my experience in the world of responding to various vehicular crashes ( I don't believe in accidents as they all have a cause) the one aspect I can tell you is that in the event of a crash where the rider and bike or car become separated, turning off the engine never happens until someone like myself arrives on scene. Usually the tilt or bank angle switch has already shutt off the engine a fraction of a second before it grenades itself. Ok so... I have rambled long enough, just wanted to add my 2 cents worth.

Thank you...this is a good read...I have specialized training in crash reconstruction and its associated injuries and I agree that there are not many 'accidents' out there....rather, they are 'crashes'...

 

[hondaman]

kill switch.The only way to shut down and keep BOTH hands on the handlebars if something BAD happens.

 

[strats]

kill switch.The only way to shut down and keep BOTH hands on the handlebars if something BAD happens.

:agree:
Its one the first things they teach you when sitting for your license here. ALWAYS shut down the bike using the kill switch, then, as Scotty said, it's second nature in case of a catastrophe.

 

[NancysToy]

Runaway engine... stuck wide open... for one... several different ways it can occur... most likely would be a frayed "open" and broken "close" throttle cables.

Another... catastrophic brake failure... shut engine down, downshift and use engine compression to stop.

.
.

Fire's no fun, either. Kill switch will shut off the fuel pump on an injected bike. Don't ask how I know. I agree that in a crash one is unlikely to hit the kill switch unless he is an airplane pilot or a racer. We seem to be the only ones that think of it.
-Scotty

 

[Spyderman62]

Thank you...this is a good read...I have specialized training in crash reconstruction and its associated injuries and I agree that there are not many 'accidents' out there....rather, they are 'crashes'...

Many years as an accident scene investigator, as a first responder due to my job on the highway dept, and as an avid motorcyclist with many safety/first aid training and first responder plus accident management courses - it is disturbing what you will still see out on the road when you arrive at the scene.

 

[ataDude]

Runaway engine... stuck wide open... for one... several different ways it can occur... most likely would be a frayed "open" and broken "close" throttle cables.

Another... catastrophic brake failure... shut engine down, downshift and use engine compression to stop.

.
.

Fire's no fun, either. Kill switch will shut off the fuel pump on an injected bike. Don't ask how I know. ...
-Scotty

Now, that's a good one ... can't believe I forgot it... had a BSA Lightning go up in flames once.

.