Hunter of Trolls
Join Date: Nov 2012
Location: east coast
Thanked 192 Times in 148 Posts
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you're skimming the surface on an issue I believe is present with tuned trucks, but haven't had the, uh.. joy? of discovering for certain....yet.....
it's my belief that the tables that are adjusted on the PCM account for the 'operational' tune, but not the limp true blue limp mode.. the true limp home mode runs off it's own script, or one specific to it that doesn't get accounted for when you tune the transient tables with a programmer..
I'm thinking what happened to you is the limp mode took over, and because your connection failed and the PCM tripped comms... in that mode, it went through a built in test (BIT), where it didn't find some sensors that joined Hoffa when you worked your exhaust over... poof.. a 'pull over safely' message likely briefly appeared before the truck killed itself...
I asked H&S about this, but didn't get a response.. it's a little worrisome because it could happen when you're out on the road a good distance from support.. it seems a 'fix' would simply be re-drafting fomoco scripts for the limp home mode(s)..
mebbe I'll ask them again.. and hope for a response..