EFI ba car mo or carb? if EFI, malamang sa servo yan. if carb, di na gumagana yung solenoid dun sa carb which is supposed to raise the rpm whenever the A/C is turned on. yung liteace namin dati, nasira yung solenoid sa carb (idle up), d na namin pnapalitan yung solenoid, inadjust na lang nung mekaniko yung timing para di na bumaba yung rp pag buksan ang A/C. didnt understand what he did e, but it worked. no more shaky engine after the timing adjustment