This car’s problem was that the engine idles roughly and it performs very badly, goes in limb mode. I have pulled codes from the ECU and got the following:
Cylinder 2 P0302 – 000 – Misfire Detected – Intermittent Freeze Frame: Fault Status: 00100000 Fault Priority: 2 Fault Frequency: 2 Reset counter: 6 time Indication: 0 Freeze Frame: Bin. Bits: 00000100 Load: 100.0 % Lambda: 0.0 % Speed: 60.0 km/h Temperature: 46.0°C Absolute Pres.: 796.3 mbar RPM: 2250 /min 16684 – Random/Multiple Cylinder Misfire Detected P0300 – 000 – – Intermittent Freeze Frame: Fault Status: 00100000 Fault Priority: 1 Fault Frequency: 1 Reset counter: 7 Time Indication: 0 Now this could be as follows: 1.Plug dead at no 2 piston 2.Ignition coil faulty Piston 2 3.Injector no 2 – faulty.
I have removed the plug from no 2 and it is completely black, not wet black but pitch black, this indicates that this piston is over-fueling. I have done a coil test and it tests fine. Now to enable me to really pinpoint the problem. I have changed injector 2 with no 4 and asked the customer to bring the car back after a day or so. After the customer brought back the car with the same problems I have pulled codes from the ECU again and just look at the results [b]16688 – Cylinder 4 [/b] P0304 – 000 – Misfire Detected – Intermittent Freeze Frame: Fault Status: 00100000
Fault Priority: 2
Fault Frequency: 28
Reset counter: 0
Time Indication: 0
Freeze Frame:
Bin. Bits: 00000100
Load: 100.0 %
Lambda: 0.0 %
Speed: 64.0 km/h
Temperature: 86.0°C
Absolute Pres.: 795.6 mbar
RPM: 3556 /min Now the problem is at no 4 piston, this definitely indicates the injector is faulty. Hopes this helps.