Work around namin ng mechanic (very nice person) ni speedyfix is to make the idle more aggressive (1k). Although 1 thousand petots/ 280+km per week gastos ko sa gas.
holy crap.. 1000 petot = 42.5L sa old price ng shell velocity (23.5/L) -- pera tumaas na daw by 0.60. assuming yung 280+ km mo is 290 km, 290 km / 42.5L = 6.8 km/L yikes. maybe it's worth trying to fix the problem.

some other things i can think of: in addition to yung sinabi ni caloyski na clean the TB, try also cleaning the IAC valve, and the MAF.