Hi Gayan,
Guessing is not going to solve the problem.
If the miss is intermittent, the most likely cause would be the spark plug and/or related parts.
Did you ohm the spark plug wires to check if any is bad?
While cleaning the spark plugs, did you check the spark plug gaps?
Are the conditions of the spark plugs good?
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Tuesday, July 6th, 2010 AT 9:20 AM