suggestions on whtas wrong with the missfire

dmvirus

New Member
Feb 14, 2007
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cebu, philippines
i just had the clutch changed and my engine oil changed. after the oil change the engine starts missfiering when i rev it..ive checked everything, the sensors, the sparkplugs and have even had it diagnosed for error codes but there seems to be no problems. i still have to check my fuelpressure but id like to ask you guys for suggestions on whats wrong.

the oil was initially eunoch 10w30 but i had it changed to castrol gtx? 20w50...just wondered if maybe that would have any significant effect.. i live in the philippines so i figured i needed a higher rating..thanx