just to update you guys: Dinala ko kahapon sa Nissan Commonwealth/ Prince motors yung car ko for diagnostics. They found that the "AAC valve" is not functioning properly. apart from that they also suggested to replace the following parts:

power steering suction aand return hose
distributor oil seal and gasket
valve cover gasket
high tension wires
replace plugs
fuel filter

I have asked about the estimated cost. The AAC valve alone costs P7,000. Sabi ko ay mag-try muna ko maghanap sa mga japan surplus shop. I paid the diagnostic fee (P680) and went on my way to Banawe to look for the AAC valve.

On my way home, napansin ko na hindi na namamatay yung makina ko kahit hindi ako naka- aircon!!

Hindi ko alam kung ano nangyari??? Ang napansin ko lang ay medyo tumaas yung RPM ko. Minsan kahit naka idle lang ay tumataas siya ng 1300 rpm. pero minsan ay bumababa naman sa normal 900-1000rpm.

Question: Kailangan ko pa rin kayang palitan yung AAC valve ko? Or kaya nang ayusin ng tune-up yung pagtaas ng RPM ko?

Meron ba kayong alam na makukuhaan na surplas ng AAC valve, if so magkano kaya?

Thanks po ulit sa lahat.