2007 Jeep Grand Cherokee 4.7L

Rackin my brain over here! 2 codes: System too rich 1/1 Multiple cylinder misfire

Throttle Falls on face/ bucking,jerking/ loss of power when the weather is HOT. 60s and under runs absolutely fine!!

Nov 2023: Engine rebuilt from Dropped valve seat Cylinder 8 I believe from overheating

Parts replaced (ALL OEM CHRYSLER)when rebuilt from valve seat, also over time as this problem progressed(in order from rebuild to present day):

Timing chain/guides/sprockets Head gaskets Heads resurfaced Valve seats notched (4.7 notorious issue) Gaskets everywhere nothing missed lol

Spark plugs Coils Injectors Cleaned out/pressure tested fuel rail PCM MAP sensor All 02 Sensors Catalytic converters not clogged IAC motor PCV valve Smoke test came back clean (both intake and exhaust) Compression test ran again Leakdown test Noid light tester Ohms/voltage tested from injectors/coils to PCM (ruling out wiring issue)

We’re stumped… LTFT bank 1: -20% STFT bank 1: -3% LTFT Bank 2: -3% STFT Bank 2: -2%