Go Back   EcoModder Forum > EcoModding > EcoModding Central
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 05-11-2009, 02:23 PM   #11 (permalink)
Master EcoModder
 
doviatt's Avatar
 
Join Date: Mar 2009
Location: Utah
Posts: 388

Grey Goose (Retired) - '89 Geo Metro LSI 4 door hatch back
Last 3: 57.16 mpg (US)

Tweety - '91 Geo Metro Convertible -2 Door convertible LSI
Team Metro
90 day: 43.97 mpg (US)

Shadow - '02 Honda Shadow VT1100
90 day: 43.46 mpg (US)

Sonic - '07 Honda CBR1000RR
90 day: 42.69 mpg (US)

Filmore - '84 Volkswagen Vanagon
90 day: 20.9 mpg (US)
Thanks: 47
Thanked 44 Times in 31 Posts
With out the cut off circuit we turn the key from ON to ACC, and then back to ON when engine has completely stopped. Then it is in the ON position waiting for a bump start or key start. This is a completely normal situation for any car.

Does interrupting the ignition wire at the key switch accomplish this seeming normal way of doing this?

Doesn't this ignition wire at key switch control the fuel and spark at the same time?

I've heard concerns of fuel with no spark and spark with no fuel as potentially problematic with the spark ignition only, or the fuel injector kill only options. Are these concerns even valid? I guess in either case you get a few extra sparks or some fuel pumping, but only till the engine is dead...then all things are truly stopped? Sensors and computer codes seem to be the only potential victims here.

Maybe my naivete keeps me from understanding that your solutions are probably providing the same solution. Since mine is old enough not to know what a computer code is I probably have less to worry about?

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 05-11-2009, 02:33 PM   #12 (permalink)
dcb
needs more cowbell
 
dcb's Avatar
 
Join Date: Feb 2008
Location: ˙
Posts: 5,038

pimp mobile - '81 suzuki gs 250 t
90 day: 96.29 mpg (US)

schnitzel - '01 Volkswagen Golf TDI
90 day: 53.56 mpg (US)
Thanks: 158
Thanked 269 Times in 212 Posts
keying off also messes up the gauges in the saturn, the speedo takes several seconds to "come back online". The metro starts beeping at you. The mpguino also stops tracking speed/distance while the key is off and I'm sure a scangauge wouldn't be real happy either.
__________________
WINDMILLS DO NOT WORK THAT WAY!!!
  Reply With Quote
Old 05-11-2009, 02:56 PM   #13 (permalink)
Master EcoModder
 
doviatt's Avatar
 
Join Date: Mar 2009
Location: Utah
Posts: 388

Grey Goose (Retired) - '89 Geo Metro LSI 4 door hatch back
Last 3: 57.16 mpg (US)

Tweety - '91 Geo Metro Convertible -2 Door convertible LSI
Team Metro
90 day: 43.97 mpg (US)

Shadow - '02 Honda Shadow VT1100
90 day: 43.46 mpg (US)

Sonic - '07 Honda CBR1000RR
90 day: 42.69 mpg (US)

Filmore - '84 Volkswagen Vanagon
90 day: 20.9 mpg (US)
Thanks: 47
Thanked 44 Times in 31 Posts
Got it. Thanks for the clarification. The dilemma makes sense now also.
  Reply With Quote
Old 05-11-2009, 07:29 PM   #14 (permalink)
Efficiency freak
 
Bearleener's Avatar
 
Join Date: Mar 2008
Location: Berlin, Germany
Posts: 58

Frugolf - '96 VW Golf wagon
90 day: 40.36 mpg (US)
Thanks: 0
Thanked 15 Times in 6 Posts
I second MetroMPG's and dcb's approach, interrupting the signal on the wire coming from the Hall sensor on the distributor. In my car it's a yellow-and-green wire. Been using it for about 2 years without any problems. (At first I was afraid I might be damaging the catalytic converter, but the car just passed the emissions inspection with flying colors.) Should work on any engine, it will cut both fuel and spark. I bumpstart whenever possible but I also installed a start button, tapping a relay into the wire going from the key's starter switch.

Other options: My car doesn't have an injector fuse. Cutting the fuel pump would give a delayed response and I suspect the ECU may try to compensate for waning fuel before it dies.
__________________

You ever notice that birds pulse & glide, too?
  Reply With Quote
Old 05-18-2009, 02:01 PM   #15 (permalink)
Master EcoModder
 
doviatt's Avatar
 
Join Date: Mar 2009
Location: Utah
Posts: 388

Grey Goose (Retired) - '89 Geo Metro LSI 4 door hatch back
Last 3: 57.16 mpg (US)

Tweety - '91 Geo Metro Convertible -2 Door convertible LSI
Team Metro
90 day: 43.97 mpg (US)

Shadow - '02 Honda Shadow VT1100
90 day: 43.46 mpg (US)

Sonic - '07 Honda CBR1000RR
90 day: 42.69 mpg (US)

Filmore - '84 Volkswagen Vanagon
90 day: 20.9 mpg (US)
Thanks: 47
Thanked 44 Times in 31 Posts
Quote:
Originally Posted by MetroMPG View Post
My switch is inline with the coil pickup in the distributor. Is this what you're referring to as "camshaft sensor", dcb?

The engine occasionally stumbles when it's used. That could be dieseling from fuel still coming through the throttle body - I don't know. I've never tried any other method.

My repeated advice - regardless of method chosen - use a momentary switch, not an on/off one. (Safety implications. You would think after hundreds of uses that you'd always remember to turn it back on, wouldn't you? )
I installed mine last weekend.
I followed this advice and it worked perfectly! Thanks!
I went with the black/white wire off the distributor on the Metro. According to the schematic they both should work as stated but black/white seemed a better choice.
I did use a small normally closed momentary which I mounted like a trigger on my shift knob. I was a bit concerned about the long term reliability of this momentary switch so I also added a bypass or override toggle switch in parallel before the momentary. This way if the momentary ever fails open (no start) I can flip the toggle it closes the circuit and things are running again.

Looking forward to effortless EOC. Now my blinkers still work in EOC, no beeps, and once I get my MPGuino finished it will also stay on.
  Reply With Quote
Old 05-18-2009, 02:05 PM   #16 (permalink)
Administrator
 
Daox's Avatar
 
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,203

CM400E - '81 Honda CM400E
90 day: 51.49 mpg (US)

Daox's Grey Prius - '04 Toyota Prius
Team Toyota
90 day: 49.53 mpg (US)

Daox's Insight - '00 Honda Insight
90 day: 64.33 mpg (US)

Swarthy - '14 Mitsubishi Mirage DE
Mitsubishi
90 day: 56.69 mpg (US)

Daox's Volt - '13 Chevrolet Volt
Thanks: 2,501
Thanked 2,587 Times in 1,554 Posts
Just an FYI, the guino will always stay on since it is wired to 12v constant. The problem is that when you key off, the sensors don't have any power going to them so the guino reads no signals from them. Glad it worked out for you! My turn next I guess.
__________________
Current project: A better alternator delete
  Reply With Quote
Old 12-25-2009, 05:33 PM   #17 (permalink)
aero guerrilla
 
Piwoslaw's Avatar
 
Join Date: Oct 2008
Location: Warsaw, Poland
Posts: 3,745

Svietlana II - '13 Peugeot 308SW e-HDI 6sp
90 day: 58.1 mpg (US)
Thanks: 1,324
Thanked 749 Times in 476 Posts
For anyone who finds this thread, I'll add that there is a thread dedicated to Killing a diesel.

Quote:
Originally Posted by Daox View Post
Cut the crankshaft position signal
I think dcb recently posted about using this method. I'm not sure if it cuts fuel and ignition all at once? If so, this would be great one wire solution.
In my case (HDi commonrail turbodiesel) I can unplug the crankshaft sensor with no change in engine functioning. Unplugging the camshaft sensor doesn't stop the engine, only keeps it from starting if already stopped. No codes. Haven't tried pulling both sensors at the same time.
__________________
e·co·mod·ding: the art of turning vehicles into what they should be

What matters is where you're going, not how fast.

"... we humans tend to screw up everything that's good enough as it is...or everything that we're attracted to, we love to go and defile it." - Chris Cornell


[Old] Piwoslaw's Peugeot 307sw modding thread
  Reply With Quote
Old 12-15-2010, 03:53 AM   #18 (permalink)
EcoModding Lurker
 
Join Date: Nov 2010
Location: missouri
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
I know this is an old thread but thought this would be as good a place as any to ask. I bought a 94 metro xfi last month. Would it be better to use the red wire which is the ignition reference high or the white wire which is ignition reference low, or does it matter? My service manual says that at the ecm the red wire = light green pin b1 and the white wire = purple pin b9. Has anyone had problems using the wires under the dash as opposed to near the distributor? I only ask because for some reason many seem to have problems tapping into the fuel injector wire near the ecm when installing their mpguino ( which I received about 2 weeks ago but have yet to find the time to install.)
  Reply With Quote
Old 12-15-2010, 01:24 PM   #19 (permalink)
Master EcoModder
 
JacobAziza's Avatar
 
Join Date: Mar 2009
Location: Oakland, CA
Posts: 397

Big Orange Work Truck - '83 Ford F-250
90 day: 27.54 mpg (US)

Jessica's - '04 Toyota Matrix
90 day: 41.21 mpg (US)

Ninjette - '01 Kawasaki Ninja EX250R
Thanks: 44
Thanked 68 Times in 45 Posts
Quote:
Originally Posted by dcb View Post
keying off also messes up the gauges in the saturn, the speedo takes several seconds to "come back online". The metro starts beeping at you. The mpguino also stops tracking speed/distance while the key is off and I'm sure a scangauge wouldn't be real happy either.
This is why I love owning pre-computer cars.
I did exactly what doviatt suggested, and it works great. Simple, reliable, effective.

On to the present:
On a car with DFCO, would there be a way to tap into that system, and activate in manually? Since it is built in, seems that might be the way to stop fuel to the engine which the computer and sensors and everything would object to the least
__________________




Quote:
Originally Posted by Piwoslaw View Post
A few months ago I returned home just as my neighbor pulled into his driveway. It was cold (around freezing) with some rain and sleet, and he yells to me: You rode your bike? In this weather?!?

So the other day we both returned home at the same time again, only now the weather is warm, sunny, with no wind. And I yell to him: You took the car? In this weather?!?
  Reply With Quote
Old 01-28-2011, 03:25 PM   #20 (permalink)
EcoModding Lurker
 
Join Date: Jan 2011
Location: washington state
Posts: 37

The green machine - '94 Geo Metro
Thanks: 0
Thanked 3 Times in 2 Posts
kill switch idea

I have been following this forum for some time. I have two 1994 metro's one auto and one manual. I have in my manual metro a brand new motor with 1 mm oversized pistons the compression raised to 11 to 1 ratio. stainless valves bronze guides 3 way cut on the valves and the motor was balanced. all marks on everything is to factory specs. I also did the grinding on the head i think it was call sign grooves? so i know have 1000 miles on it and it gets exactly the same gas mileage as when it had 176k on it. about 43 mpg

i'm documneting every thing in a note book as i drive to keep some records.

So now it begins trying to find the tweaks. my first tweaks i thought would be a kill switch and manual throttle handle.

My idea on the kill switch is to kill the cam sensor or distributor and use the clutch saftey start switch to do it. You dont need to cram the clutch pedal to the floor to shift so i thought why not disconnect the switch and have it interupt the cam sensor since you need to clutch the engine and kill the switch at the same time to be the most effective.

has it been tried yet?

  Reply With Quote
Reply  Post New Thread




Similar Threads
Thread Thread Starter Forum Replies Last Post
Kill switch how-to bbjsw10 DIY / How-to 195 05-20-2014 02:27 PM
Kill switch for 88-95 Honda Civic/CRX/DelSol AndrewJ DIY / How-to 40 06-18-2012 04:13 AM
Fuel injector kill switch for '05 Scion xB The Fridge DIY / How-to 21 09-24-2010 04:37 PM
Fancy kill switch wiring extragoode EcoModding Central 2 10-15-2008 02:14 AM
Winter mod - heater blower integrated with engine kill switch MetroMPG EcoModding Central 3 12-31-2007 11:31 PM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com