I found a new toy for the 2 Nd Gen trucks now... We all know that our Cummins engines don't like to be idle for long period of time. And hence why Dodge/Cummins came out with this TSB...
But since there is several things that are required to trigger this high idle / 3 cylinder idle it make it kind of usless to someone in the southern states that doesn't see really cold temps.
But that is all gone now... I figured out a way to trigger the high idle & 3 cylinder idle and I can warm up my truck in about 3-5 mintues now.
The TSB flash by a Dodge dealer or borrow a Smarty for a brief moment and run a program and reset to stock.
Now once you have the flash to enable high ilde and 3 cylinder idle then you can do this trick. Now I'm doing it rather crude right now but going to get the part to build this. Remove the connector to the IAT sensor. Take a resistor (Green, Blue, Orange, Gold) 65K Ohms and plug it in the connector of the wiring harness. This will make the ECM think that the IAT is seeing 13*F and trigger the high idle program.
Now it will idle for about 2 minutes before activaing the software. Then it will ramp up to 1,200 RPM. Then it will turn on the 3 cylinder idle. At this point if you have a exhaust brake
turn it on. It will make the pyro rise all the way to about 800-850*F... Yes it will be warm!
This program will continue till the coolant reaches 175*F then the program is cancelled and normal idle continues.
I'm in the process of build this without cutting wires or making a wiring nightmare. So bare with me and I'll share my idea with you all...