my engine is only firing on three cylinders.its firing on 2,3, and 4 but not the 1st one.i have changed the spark plugs and coil pack.taken the plug out to make sure its sparking and it is.its getting fuel to it because when the plug is removed its covered in petrol.done a compresion test aswel and theres plenty of compresion.anybody had the same problem????

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black and gold