1995 Cadillac DeVille Engine Problems - Help

I'm just gonna say everything wrong with my DeVille.

When I start up my DeVille, sometimes it has trouble idling. The RPM's drop really low, and then the engine kicks it back up. It does this about every second. But after 15 seconds or so, the car idles fine. About 1 out of every 10 times the car stalls.

Also, when I start to accelerate from a dead stop, it jerks forward about 3-5 times.

Another thing, the car surges. Staying at a constant speed, the car will tug forward a little about every second. (This is very similiar to how it sounds while idling)

My car seems to have lost power while accelerating too. It accelerates a lot slower than it used to, but there is a surge of power every few seconds where the car accelerates much faster.

One more thing, premium unleaded gas is recommended for my Cadillac, but I've always used regular unleaded. I still have these problems when I use premium gas though.

Does anyone know what the problem is and how to fix it?

Welcome to AF, there are many possibilities here, this cannot be properly diagnosed in this forum, fuel pressure should be checked, clean fuel filter installed, a full scan done to look at sensor inputs and pending codes, how are the the plugs, wires, has the throttle body and iac been cleaned.

Do a tune up, it probably is due anyway, spark plugs, wires, rotor, rotor cap, etc.