Hi there! Some might remember me from around 7 months ago, i had an idea to make a remote vehicle ignition that could start a car via txt message.
Well, some months on i've pretty much finished the project, and all runs well in my EFI car and has done for months without a hitch.
I've got a friend who has an old toyota hilux and wants me to install one, the problem being this: The way my prototype works is, it receives the ignition code/pin via text message through the GSM board, then checks to see whether the car is already running; if not it will then put the car onto the reds (ON), then after a few seconds it will proceed to fire the starter motor. It will do this until either until a 10 second timer is up or it senses 12v from a random wire i found behind the dash that is only powered when the car is running, therefor it assumes the car is running and shuts off the starter motor.
The problem is this, my friends old non EFI hilux doesn't have a computer nor any other 12 source that i can find that is live only when the car's engine is running.
What possible ways would there be for my arduino to detect that the vehicle is running after cranking and thus turn off the starter motor? Would an option be to make a revolution sensor?