my TB was fine. just that the batt was 2.5 yrs old already.
well i'm not too sure but before this, when idling and i just stepped on the throttle to let the rev go up a little, when it drops back down, it goes to almost below the recommended line adn the whole car would start to vibrate and in some cases it has stalled. however, tried the same thing after yesterdays' battery change, the needle dropped back to its usual position without going below the mark or any vibrations at all.
:D
hope this helps la. could be just a one of thing u know.