My '13 non-PP is doing same thing. Started getting light at <800 RPM now up to 1200 RPM to make go out. Most likely problem is related to TWO dead turbos, now puking oil but COULD be the switch. But I've also noted that I get no heat at idle, but it will warm up just fine if I rev just a bit (> 1000 RPM). My mech says the idle is all catty-wampus, again most likely due to P0299 code due to 2 dead turbines; but that doesn't explain the no heat issue. I suspect it's the water pump impeller corroding or pump in imminent failure mode.
Soooooooooooo......My girlfriend is going into my mech on the 14th to get timing chains, water pump, oil pump, turbos, vacuum solenoid/valve, EOP switch all replaced, . I'm going with OEM turbos after an hour on the phone with Dave and Anthony over at Livernois debating pros/cons of upgraded turbos. Even Mike Bambic's upgraded CHRA's would require putting on upgraded HPFP and, and, and....So just gonna keep it stock for time being. However, I am going to splurge and install Mike's Hot Pipe upgrade (in RED powder-coat w/ RED silicon connectors)!
She's my DD and has 167K on her. I never track her, just love seeing shocked looks from Hemi and 'Vette jockey's when I leave them behind and BEATING THE SNOT out of impetuous and precocious youngsters in their obnoxious fart can equipped rice-rockets LOL!
All in all I'm gonna be into this for about $4K when all is done (labor included). I think that's worth keeping my green eyed doll on the road for a few more years!
Happy New Year all, and a special shout out to SHOdded who has been an absolute SAINT helping me sort out parts and such. He's a SUPER valuable member and I always appreciate his help and support on this and the SHO forum!