mga sir.. ask ko lng.. i have acquired a '94 corolla gli matic.. tpos napansin ng dad ng gf ko that the idling is noisy daw and ipacheck ko.. what could be a reason para mging maingay ung idling? as far as rpm nman kc, all seems fine.. although pag nka-idle ako tpos nasa D ung shifter, mejo manginig ung engine..pag nkaneutral smooth naman.. any inputs po?