jetpell

once in a while my truck will idle rough, upon acceleration it stumbles/misses, and usually the engine will get stuck @ approx 1500 rpm and drive as though the cruise control is on. the rpms will maintain around 1500 up to a dead stop and accelerate once the brakes are released. the poor acceleration will maintain and if enough throttle is applied it will knock and ping accompanied by white smoke. the only way i can get rid of the stuck rpms is to put it in neutral I have considered injectors but once in neutral the engine revs and decels normal with no sputter, stumble, ping, or knockI have read about the APPS- but i dont think the 05's have themFCA- i think might be a problem, but i have not found any way to diagnose itI did a transmission flush and changed the solenoids attempting to fix it, it didntany other ideas or advice would be GREATLY appreciated, thank you in advance!truck is a 2005 5.9l 48RE 4x4 auto trans 168800 miles. silencer ring removed, no other mods

going to do a fluid change this weekend, parking it is not an option unfortunately, no codes on the pcm

my truck recently started getting "stuck" in 2nd gear. @idle the truck will have a slight vibration when it is going to do it, during light acceleration the truck stumbles or misses and approx the time you reach 17-2000 rpm and release the accelerator the truck stays @ approx 1500 rpm until the tranny is shifted into neutral or it corrects itself, under heavy acceleration the shudder disappears however if acceleration is heavy once it is stuck there is a rapid clunking sound that i cannot pinpoint its origin. Fluid level was low, within the safe crosshatching, topped it off, have tried tow mode with no change. I've read several posts on the gov press solenoid and switch, im leaning toward that but none of the symptoms i've read mirror mine. I read the posts on here about the alternator diode, but from what i can gather my alternator wiring is different than the ones affected. All help is appreciated.2005 5.9l 48re 4x4, 168k