I need help fast guys!!!

My siter owns a 93 CamryLE automatic with 110K miles on it. Here's the deal... The car starts fine, drives fine, but every now and then at a stop sign or stop light it will just die. It smells like it is burning rich. I can also see a little black smoke from the tailpipe every now and then. Other then that the car runs great and is in great shape. We took it to a Toyota dealership and they didn't know what was going on.............wtf.............anyways I think they swaped out the old engine mounts, put in a new timming belt and put new plugs in it.

So what do you all think?? MAP sensor or what??

Any help is appreciated.

-Elijah-

i think u need to clean ur eng. .....because there is too much carbon deposits and carbon and dirt and such inside the engine. thats wut happen to my moms car.....but im not sure if its same problem on ur car or not....u still try it on ur car maybe it will works......just do some research about clean eng. carbon and dirt....