Cadillac Repair: 85 Cadillac Eldorado, cadillac eldorado, eldorado

Question
QUESTION: It's a 4.1 and it is very lazy, it has a slow pick up and it hesitates. What could be the problem?

ANSWER: Did you resolve your problem. I have been out of town for several days.

---------- FOLLOW-UP ----------

QUESTION: Not as of yet

Answer
IS or HAS the CHECK ENGINE light ever illuminated while driving the vehicle and or has any other lights illuminated or any messages from the message display center ?.

What work or diagnostics of ANYKIND WHAT-SO-EVER have been performed on the vehicle trying to fix this problem ?.