1995 Cad. Deville. Engine light on, runs rough especially on idle. I was told that maybe the emc monitor may be problem? DDT

Well, it could be.. We kinda had the same problem. And believe it or not it mite not even be the tyranny it mite be your... EMC brain
We had the same problem changed the EMC
It pop up all kinds codes and it was that...
Good luck.

Sounds like a blown head gasket.

True of many cars. Happened to me too many times, fourin
or domestic.

Hi, Try to replace fuel filter. It maybe clogged up and making engine run rough or poor. Also check and replace spark plugs. A bad spark plug will make it run rough too. Good luck.

maybe bad gas or gas filter check spark plugs and wires

I had same problem, and found the problem again in egr, replaced it under warranty and bingo.

maybe coil pac!!!

i would first change the fuel filter with it being run low in fuel it may have picked up some trash off the bottom of the tank so change the fuel filter and see if it runs better

Check your timing

I have a 1994 Cadillac Eldorado and every time i start it the car has rough Idle and the Idle fluctuate's. I also can feel it in the gas pedal when the car is doing this I tried replacing the throttle body sensor but it still does it I also was told it was the Idle error sensor. So instead of spending the unecessary money again I thought I would go online and see if anyone could help me with this problem.