ORIGINAL: apriliamille
sorry wrong words
i plug in the battery turn everything on and throw the switch on my tx for the opti kill to engage and i hear a pop in the head like an initial firing of the plug
I know why. It's because this ignition fires when you first power it up. I found this out while testing mine with the plug out. When you turn the ignition on it pops once. Not sure why but I feel this is a little dangerous. If it were on the compression stroke the engine could start by itself. Very rare but could happen.