It's a 2007 Limited AWD w/ 38K miles. A few days ago I noticed a lack of power on hard acceleration. I also noticed a faint rattling or clicking noise from the engine under acceleration from a standstill, even after the engine is at operating temp. Sounded maybe like valve or lifter noise. Checked fluid levels and everything looks fine. Oil cap looks clean. Oil is dark but nothing noteworthy (synthetic w/ 8K miles on it) Then today it threw a CEL, P0304 (cylinder 4 misfire) and P0300 (multiple random cylinder misfire).
Anybody else experience cylinder misfire problems?