Originally Posted by
Mototime2000
Hi all, first time poster here and a HPT Newbie. Little personal tuning history, I'm familiar with TunerStudio, BinaryEditor, FAST and Holley from previous projects and helping others but Ive purchased and used HPT very little.
I have a 2012 F250 and a 2016 F250 that are my personal trucks that I would like to become more familair with the tuning side of things. currently the 2012 is tuned with exhaust and a SOTF switch. I have pulled the file out and taken a look at it and pretty sure I understand most of what I am looking at. The current plans are to update to a 2015+ turbo and injection pump. I have access to a stock 2015 tune file and can copy/paste but would like know the "why" behind the changes more than how to change, and also what kinda values(and why) I can change to get the most out of these current planed changes.
On to the 2016 truck... I purchased this truck wrecked without and engine. After getting the engine installed I have found the truck was previously tuned, non vgt turbo and dual fuelers were on it before the accident... with the truck now having a single injection pump thr truck would not start due to the Fuel VMV table being near doubled and causing the VMV to be shut during cranking. I pulled a stock 2016 VMV table and flashed it in and now we are up and running but the idle is very choppy almost like a cammed idle tune on older powerstrokes. Looking for some insite on this and seeing what tables could possibly do that or do I have another issue to diagnose. I have access to a IDS and VCM II, when the idle is choppy the power balance shows 2 cylinders are misfiring, but its not the same 2 all the time. it rolls down the cylinders in firing order or companion cylinder form.
I know this is long winded for a first post but I would appreciate any and all information available. if nothing else the knowledge may be useful days months or years from now.