My 1989 Oldsmobile Delta 88 Royale recently began to run a bit rough. The CEL came on so I did the wire jumper and I received engine code 42.

It has also stalled twice on me in the past week. This usually happens when driving along and I stop at a light. It will idle and then stop. Luckily, it will start back up again.

Another issue (or same issue) is that it feels like it is hesitating when I drive it down the road.

Recent repairs:
New Battery and Alternator.
Pulled two plugs and they look new
Wires look new too.