My 2001 range rover is misfiring on 3cylinders I have changed the plus checked for vacuum leaks and all four o2 censors can't finger the cause

Asked by Mar 24, 2014 at 05:57 PM about the 2001 Land Rover Range Rover 4.6 HSE

Question type: Maintenance & Repair

The engine is misfiring on three cylinders changed the plugs checked for vacuum leaks
and tested the 02 censors can't find cause

2 Answers

55

Check the spark plug wires. It might be one of the spark plug wire boot is loose and causing an arc between the engine and spark plug wire. Check this at night, if you see an electrical arc between the engine and spark plug boot, then you found the culprit. You can change the spark plug wires(recommended) or just put electrical tape inside the boot. Let me know if that was the cause. Thanks and good luck.

5

I had the same thing on my 02 rover and it was the coil pack. I replaced both coils and it worked

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