Stealthy injector kill switch, 6th Generation Civic

[California98Civic]

Originally Posted by Mista Bone

Question: What are you doing with the throttle when cutting the fuel?

Thanks. Pretty cool mod, huh? If I understand your question, the answer is "nothing." I take my foot off the pedal put the car in neutral or at least depress the clutch the instant before I cut the injectors. Engine cuts-out and I coast, with all systems on, until I choose to restart by kiss-starting with the clutch, or key starting. I get some very long glides too. On occasion I have glided with the injector switch in the off position, so there is no fuel or chance of engine start, glided in gear at WOT to generate power and move coolant and listen to the engine pump air without burning fuel... pretty weird sound. And of course, at WOT, the car will glide a little further. But I don't do that regularly because I'm afraid of wear on an engine that might not be pumping oil at that moment.

[Mista Bone]

Doesn't matter where the crankshaft is getting power from, either by combustion or gravity and through the transmission, if the crankshaft is spinning it is pumping oil.

My original idea was to use the two horn buttons or switches on back side of the steering wheel, one to kill the motor without killing power to the ECU then another to engage the starter to fire the motor back up. This would have been used at stoplights, sorta like how the Prius and Insight do now.

One issue with coasting at WOT and injectors off, you can cool the motor and cylinder walls down too much, only an issue in cooler climates. I have done the exact same thing with an overheating motor. Heater fan on full blast, letting gravity circ. the coolant, then cool air to cool the engine from inside the cylinders.

[Ecky]

This kill method doesn't shut off power to the cluster, right? Using the key kills the VSS signal.

[California98Civic]

Originally Posted by Ecky

This kill method doesn't shut off power to the cluster, right? Using the key kills the VSS signal.

That's right, I keep all functions. Everything OEM stays lit up normally, without interuption. But sometimes my ultra gauge cuts out momentarily, though without losing the continuity of the data, it seems.

[j12piprius]

Originally Posted by California98Civic

I keep all functions. Everything OEM stays lit up normally, without interruption. But sometimes my ultra gauge cuts out momentarily, though without losing the continuity of the data, it seems.

Thanks much for your writeup. I finally hooked up a kill switch, which works fine as described, except the ultragauge goes off and stays off an additional 10 seconds after flipping the switch back on. Any ideas why the ultragauge goes off, and how to keep it on when using the kill switch?

[2000mc]

i dont know if this would be the same on an ultragauge, but i had to tell my scangauge it was in a hybrid after i put in a kill switch, for a simmilar reason

[oldtamiyaphile]

Originally Posted by California98Civic

But sometimes my ultra gauge cuts out momentarily, though without losing the continuity of the data, it seems.

My UG does this too without a kill switch. You get what you pay for I guess, might have been a faulty batch.

[j12piprius]

From the version 1.2 manual:

Compatibility > pwr off detect mode
For most vehicles, ultragauge will correctly detect when the ignition has been switched to OFF with the default setting (0). Modes 0, 1, 2 and 4 operate the same [except] a different parameter is read from the vehicle's computer.

Update: changing the #s to 1, 2 or 4 didn't make any difference.

[PaleMelanesian]

Originally Posted by johnlvs2run

was bump starting around 2000 rpm on my trip (which slows the car at those rpms, so I won't use it on trips anymore).

http://ecomodder.com/forum/showthrea...gine-1141.html

[j12piprius]

Success! Changing pwr off retries keeps the ultragauge on.

Compatibility > pwr off retries
If ultragauge at times enters low power mode and briefly turns off the display ... increase the number of retries (5 is default) until the behavior stops. A side effect of increasing the value is that ultragauge will remain on for a longer time after the ignition is switched to off. Changing this setting to a value greater than ~45 is not recommended.

Changing the value from 5 to 33 keeps the ultragauge on for 10 seconds after the toggle (ignition) is switched off. This is plenty of time to switch the toggle back on, and then the ultragauge continues to stay on.