1995 sls boggy
 

i have a 95 sls and i just swapped a newer motor into it with 100k at first the motor ran really nice and i could feel the entire motors potential power and now i feel like its not necassarily boggy but the power has gone down. the rpms do not jump if i put it to the carpet, also the other day it ran great again and then not so great after..anyone have any ideas on what this could be?