| Author | Message | ||
     Growl |
I see that there are 4 wires leading into the exhaust valve actuator (the thing which pulls the exhaust valve cable). 1) Would applying a voltage to one of these wires make the valve actuate? 2) Would applying voltage to same wire damage the ECM (or anything else)? | ||
| Teeps |
Growl Posted on Sunday, September 16, 2007 1) Would applying a voltage to one of these wires make the valve actuate? The correct one, yes. 2) Would applying voltage to same wire damage the ECM (or anything else)? Depends on which "wrong" circuit you hit with 12v. What are you trying to do? | ||
| Growl |
Teeps: I wouldn't mind having a button that, when pressed, would activate the valve... heh heh heh. So operation would remain normal but I could create a little rumble when passing up the thumper crowd during group rides with a local dual sport group (heh heh heh) and also there is this bar in town that is open to the street and there are always several Harleys parked out front. I don't need to impress them with BIG sound, but I have noticed that the patrons tend to check out my bike as I drive by. I would like to communicate a V-twin pulse back at 'em :-) When I come around the corner towards my house I want to send a bit of V-Twin pulse to my wife (Honey I'm Home!) it would be MUCH better than just the Whirrrrrrr of the fan which sounds like a mosquito approaching. | ||
| Growl |
So Teeps, are you saying that if I splice into one of the wires (the CORRECT wire) I can activate the valve without damaging the ECM? No danger of the voltage frying something? | ||
| Teeps |
I see... So you're wanting to do it on the fly, so to speak. Knowing that I Don't think it would hurt the ECM, but... Only way to find out could be expensive. I suppose a relay could be installed to isolate the ECM circuit(s.) That way you could supply separate power and ground. However, either way it's likely to turn the Check Engine light on and store a code. Because the actuator has a position sensor built in. | ||
| Ulyssesguy |
I may be wrong but why couldnt you isolate the ecm with some diodes? | ||
| Davo |
Growl, If I remember correctly there are two circuits going to the actuator. One actives the motor and the other circuit is feedback to the ECM regarding the location of the cam which the motor uses to open the exhaust valve cable. If you try to bypass one without regard to the other then you are going to create a trouble code. If you want to bypass the system then simply lock the cable open and let the cam free wheel. | ||
| Teeps |
No, I don't know for sure what would happen to the ECM. So, best to isolate both the power and ground circuits, then run the actuator independent of the ECM. |
