is a little bit higher than 700. first i also thought that my mounting have spoil but my mech say is still ok..whenever this problem happen,my headlamp will be blinking as if the engine is gonna die off.How low is below 800rpm? If 700 then its normal for "D" under brake.
---------- Post added at 11:26 PM ---------- 6 hour anti-bump limit - Previous post was at 11:25 PM ----------
If at 700 and your bonnet is shaking, its time to replace your engine mounting.
it is not enough fuel or the fuel system is clogged and dirty.?and my car power is lack of power.