Updated my Quadzilla to v2 version and now high idle doesn't work. If I enable high idle and delay is 40 seconds truck high idles few seconds and shuts down and doesn't start before I wait couple of minutes power off. Seems like lift pump doesn't work after that high idle attempt!

you have OEM high idle enabled.  Dont run them together as it can cause this issue.  

It worked before I updated it to v2. How can I be sure if I have oem high idle enabled???

Or can the oem high idle be turned off somehow so I can use quadzilla high idle??

coincidence is likely.

 

use oem high idle as it works better.   

I promise you if the quad high idled, then the truck shut off oem high idle is enabled.   there is a conflict in the fueling command between the ecm and the quad, the ecm goes into runaway protection mode as it senses an abrupt increase in rpms and bam the engine turns off and refuses to restart until a minute or two elapses.

 

 

If I happen to have oem high idle enabled, does it work automaticly when outside temperature drops or how it starts high idleing?? I have been reading some forums and some trucks can enable high idle with cruise buttons in steering wheel.

Read these articles. 

 

The tsb covers how it works

 

https://mopar1973man.com/cummins/articles.html/24-valve-2nd-generation_50/51_engine/high-idle-switch/

Thank you!!!