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Hi everyone- brand new to the forum. Thought I'd throw out a question about my 2008 Chevy Suburban LTZ sitting in the shop right now waiting on a replacement GM-cert refurb engine. Should be put in in the next several days. Truck has 165K miles. Started chewing oil back in 2012 at around 80K. Was in shop 3 times in 2013 with the usual AFM issues up until the 110K mile mark when the 3rd operation was done (I think it was replacement of all pistons). All-told, about $7250 of warranty work done to truck related to AFM. Soooooo, truck recently had misfiring on cylinder 5, low oil pressure warning, drop of pressure, left on side of road. Towed to dealership. Engine not holding pressure, needs new engine. I expect the engine to have 3 yrs/100K warranty. My question is this: Should I disable the AFM with the "Range AFM Disabler" (http://www.rangetechnology.com/products/range-v8) device on this 'new' engine to (likely) eliminate any potential issues, or should I trust the newer version of this engine that was ordered will behave and perform as desired. I am also a bit confused about posts discussing 'deleting' the AFM with "kits" or having to put different parts into the engine to turn AFM off, while getting normal, expected behavior from the engine. Thank you all for any feedback. Love this forum! John
I was hoping y’all could help me on my decision. I have a 2019 custom trail boss 5.3 with AFM 6 speed. I called the local dealership here and asked how my warranty would be effected if I disable the AFM. They told me “as long as that tune didn’t cause the damage of whatever i bring the truck in for all is well.” So they recommended me to a local tuner here in town which was surprising. I called him and he said to disable my AFM it would cost around 500. I do know about the range device but I don’t want to to deal with the battery issues it can cause if you mistakenly leave it plugged in. My other option is the hand held tuners such as a diablo. I have zero experience with them but I am going to put in a cold air intake and flow master 44 exhaust in the future. Would my best bet be the Diablo tuner to disable the AFM and use it to adjust my truck to my other mods or go with the professional tuner?