dear sir i hv a opel corsa swing which is rattels at
dear sir i hv a opel corsa swing which is rattels at idiling i hv done everything with the throttel body and its sensors but they r all okay and finally i checked the ignition coil and two of its ports hv much less spark then the other two could it b the resone for this erratic idiling and i want to ask one more thing norrowing a spark plugs gap for lpg use is advisable or not