I took my 2002 HO cummins with the 6 speed manual transmission to the dealer the to have the 3 and 6 cylinder high idle enabled . They said it was to warm to try it but said it was enabled . I've had a chance to test it in -18C, or 0F. Nothing happened after 10 minutes. I called them and they said my remote starter and alarm probably isn't letting it work. Has anyone else ran into this or heard this?