Hi,been trying to pin down a problem with my idle dropping when coming to a stop. It doesnt do it all the time. Ive cleaned iacv,cleaned throttle body plate/disc. Tightened up and cleaned connections also gently cleaned the maf. I thought it had cured it as after all this as i went for a drive and i couldnt get it to do it. Only next day it did it within a few minutes again. Is there anything else i can try before taking it back to mechanic. Cheers in advance.