Viper 160xv crank time

Hello all, I'm a new installer working with Code Alarm, but I'm trying to help a friend with a Viper 160XV on his 2006 F250 Diesel. I'll start from the beginning. He bought the truck two years ago with no mention of any RS, and eventually figured out it was installed and wanted to make it work. He got no response from the start button, only lock and unlock, until I told him to double-press. At this point he got a 45s-ish delay and probably a .6 second crank, not enough to start 99% of the time. I went to go look and found the unit and satellite relay. There was no LED or valet button, but the installer has installed a toggle switch to substitute for valet button. I thought it might be plugged into the programming button port but it wasn't, and I didn't bother to trace exactly how it disabled remote start. So anyway I put some wires on the pins for both empty ports and used my meter to read pulses as a substitute for the LED, and just touched bare ends of wire to sub for button presses. In this way I was able to program the crank time to 1.4 sec., but today he reports it's back to doing the exact same thing it was doing. I can't imagine how it got back to the short crank time. So my questions are, how can I program it back to 1.4s permanently? Barring that, I'll hook up the tach wire which I believe on Ford will have the handy little customer access wire bundle with a tach wire. Reading the install manual though I'm reading about using and learning a "jumper" etc., and I'm just not familiar with this as it's never been an issue with the products I use. Also, will it be pretty straightforward to reprogram to tach and to learn the tach, or are there issues I may encounter that aren't covered in the install manual? Thank you in advance.

IF you run and program tach you wont have to worry about setting the crank time. The crank time is if you have it set to voltage sense which you don't want to use on a diesel. And If I remember correctly I believe that year has the built in starter anti grind which means you can hold the key in the start position even after its running and the starter wont grind. If it does have the anti grind just set engine checking to off and put the crank time all the way up and you wont have to run anything. With the truck running turn the key to the start position, if it grinds run tach, if not engine checking off and crank time all the way up.

Also make sure wait to start is hooked up. If not you can just set it to 15,30,45 seconds depending on your climate.