2000 SLE 3.8 sluggish when floored
My car wouldn't start in subzero temperatures, so I pushed it into the nearest barn. Father-in-law came by and shot 'starting fluid' into air intake and we got it started. Since then, it'* had a sluggish or hesitant response to acceleration.
Changed fuel filter, plugs and wires, noticed a darkened stem on 2/5 coil, replaced it after code reader said "multiple cylinder misfire" and "Low Level O2 sensor" (SES light). Tested IAT, MAF, IAC, ECT, TPS, and fuel injectors.
I have yet to replace O2 sensor, test the crankshaft position sensor, and fuel pressure test.
The car starts and idles fine. RPMs climb with gradual acceleration, but when stomped, it sputters and RPMs don't climb over 2000. However, the sputtering doesn't cause it to die.
I'm taking another day off work to finish up the other tasks because it is my daily driver, therefore any suggestions would help.