Can anyone help have had probs with misfire so have changed the plugs still no difference ordered leads and coil pack fitted coil pack yesterday this has im proved it but it is still there so will be fitting the leads when they arrive. now this is where the fun begins every now and again the engine was holding 2000 revs but a light touch on the accelerator and it dropped to tick over, when i changed the plugs i noticed that the butterfly was minging so i have now cleaned it with some WYNNS intake cleaner but its starting to hold revs more frequently could it be the throttle sensor if so has anyone any pics and or prices of this please help