My bro has a 89 Bonne SSE and when it starts its like its barly running and when you hit the gas its like a chug chug sound. I did plugs wires air filter just a few weks ago. The Check Engine Light is on and some times it stalls at stop. Did fuel filter just a few months back. New CAT. I have an idea what it is but he wanted me to post and see what you tought. Thank Ya

does it have fuel injection? if so maybe one of the injectors are clogged, just an idea...
try using a bottle of injector cleaner through it.

this weekend my car did the same thing...It would start then chug and hesitate while driving..i ran my computer on it and it told me it was the maf sensor...causes irradic idlling and makes your car smell like rotten eggs after its been shut off...i would change this to see if it makes a difference..9 / 10 chances are it will...let me know how it goes.

I put some fuel treatment in and the SES light went off but it still acts like its getting choked like posted before. I was thinking EGR because there is a sound coming from the back of the engine... What do you think??

Aight Ill get on those codes right away and tell ya whats up....