Out of curiosity, what are the conditions of your motor mounts? The only reason i ask, is during decceleration the ECU shuts off the injectors. (Its in the service manual and can be seen on a wideband A/F gauge) When i would have my solid mounts in i could feel it alot more. It could be just your motor being starved for fuel. This is not a bad thing, seeing the ECU is programed to do so.

k3v