So the saga of engine troubles continues! I had the car for a few weeks when I got a CEL, indicating a misfire on #3. I took the car to the DEALER and they charged me an arm and a leg for walnut blasting and a new set of spark plugs. I was okay for a while until the clutch started to groan.

After my clutch replacement, I had injection coil #3 go out. My mechanic said there was a possible O2 sensor problem when I picked the car up. It's idling a bit rough (Idle RPM as high as 900, low as 650) and I still feel a lack of power, so I took a PID snapshot after my commute home, long term fuel trim indicated -3.12%, short term was -8.59%. Is this normal? I'm running with a solid flywheel now and I'm not sure how much of the performance difference is the new clutch and what could be a problem with the car.

Here's a PID snapshot, taken after my evening commute. Am I being obsessive here? The car's been in the shop more than out over the last month.

SAE 0x03 Fuel system status Closed-loop, using oxygen sensor feedback to determine fuel mix
SAE 0x04 Calculated load value 18.82 %
SAE 0x05 Engine coolant temperature 213.8 F
SAE 0x06 Short term fuel % trim - Bank 1 -8.59 %
SAE 0x07 Long term fuel % trim - Bank 1 -3.12 %
SAE 0x0B Intake manifold absolute pressure 4.79 PSI
SAE 0x0C Engine RPM 792.5 RPM
SAE 0x0D Vehicle speed 0 MPH
SAE 0x0E Ignition timing advance for #1 cylinder 10.5
SAE 0x0F Intake air temperature 75.2 F
SAE 0x10 Mass air flow rate 0.35 lb/min
SAE 0x11 Absolute throttle position 15.29 %
SAE 0x13 Oxygen sensors present Bank 1: Sensor 1, Sensor 2, Bank 2: None
SAE 0x15 O2 voltage (Bank 1, Sensor 2) 0.76 V
SAE 0x15 Short term fuel trim (Bank 1, Sensor 2) 99.22 %
SAE 0x1C OBD requirements to which vehicle or engine is certified OBD II (California ARB)
SAE 0x1F Time since engine start 1821 sec
SAE 0x21 Distance traveled while MIL is activated 0 km
SAE 0x23 Fuel rail pressure 686.03 PSI
SAE 0x2E Commanded evaporative purge 10.98 %
SAE 0x2F Fuel level input 29.8 %
SAE 0x30 Number of warm-ups since DTCs cleared 6
SAE 0x31 Distance traveled since DTCs cleared 190.76 km
SAE 0x33 Barometric pressure 14.65 PSI
SAE 0x34 O2 sensor 1 lambda wide range (current probe) 1
SAE 0x34 O2 sensor 1 current wide range 0 mA
SAE 0x3C Catalyst temperature (Bank 1 Sensor 1) 967.46 F
SAE 0x42 Control module voltage 14.3 V
SAE 0x43 Absolute load value 20.78 %
SAE 0x44 Fuel/Air commanded equivalence ratio 1
SAE 0x45 Relative throttle position 4.71 %
SAE 0x46 Ambient air temperature 78.8 F
SAE 0x47 Absolute throttle position B 15.29 %
SAE 0x49 Accelerator pedal position D 14.51 %
SAE 0x4A Accelerator pedal position E 7.06 %
SAE 0x4C Commanded throttle actuator control 6.27 %
Aux 0x00 Input voltage read by the scan tool 14.5 V