Re: Remote starter
Sorry for such a late reply, but if someone else out there is might try this I would advice against it depending on the remote starting unit. I used to install these things all day long about 2 years ago and some units you have to cut the cranking/starting wire comming off of the ignition. This is ok if the remote start has the same size of wire or larger than the vehicle it is going in, but if it doesn't then you could run into problems. Some units only piggey back on the starter wire (you don't have to cut it, only tap into it) those tend to be a little safer.
The tach wire does help when trying to start then engine, but there are also voltage detection modes in alot of the remote starts as well. These voltage detection modes looks to see when the voltage increases as its cranking. It doesn't respond as well as the tach wire but it will work.
Another thing is some of these units have wait to start inputs that you can hook up to a wait to start light in your dash. This allows the glow plugs to warm up before the engine cranks. And if your vehicle has glow plugs but no wait to start wire some units come with a automatic set time to wait before the engine cranks to allow the glow plugs to warm up.
Hope this Helps!!
I would be happy to answer any other remote start, stereo, or GPS questions