or am i just retarded and they're the same thing

 

Nah, it is a good question. An ECM is an Engine Control Module. Only controls the engine along with the TCC in the torque convertor.

A PCM is a Powertrain Control Module and along with the engine controls the transmission (automatic trans). Trans control includes line pressure and shift points.

RBob.

 

where are they located?

 

Any-where. From under the hood to under the dash to under the drivers seat. All depends upon the vehicle.

Of course, this being a 3rd gen site, I'd say under the dash, pass side is a good bet, w/no PCMs to be found

RBob.

 

so i've got a big silver metal cigar box looking thing. that's the ecm, correct.
an since it's an 85, there is no pcm?

 

*left pointer finger on nose, right pointer finger pointing at you*

 

No thirdgen came with a PCM