This is my first time to post. I have a 2000 RL 3.5 that just started running very ruff. While it is running I can see and hear the spark just above the cylinder next to the firewall on left side (facing the front of car). Not sure what cylinder number that is. Is that likely the coil pack? Wiring issue? Is the pack difficult to change?
Thanks in advance

 

I have no idea what are you trying to say. How can you see the spark plug while driving ( unless you mean spark from the engine then it is really dangerous!) Anyway, are you trying to tell us that your car is running rough and you think the spark plug or the ignition coil might be the trouble? Well, I can tell you from my experience, when I had a misfire in one of the cylinders. It was a crack ignition coil and I replaced it with a new one. The misfire was gone and it is running smooth now. You might want to check all the spark plugs for oil and check for crack on the ignition coils. Hope that's help.

 

Check ur map sensor