Any idea what's wrong with my 99 Buick park Ave?

[D.j. Holley]

Service light is on haven't checked the code yet but when I turn it on it makes a knocking noise can't explain. Coming from the belt area just started a few weeks ago when it started cutting off on me while I was driving not going past 20-30mph with foot all the way down clunking noise getting louder as I drive and just the other day when I parked it after it cut off again it started smoking from the hood. It'd my neighbors car all I know is that she had a little more oil on the stick and her serpentine belt is somewhat cracked. Any idea what it can be? Sometimes it's hesitant to even start. Oil psi is 12-15 idle. It's a fast constant knocking type of noise I've been told water pump harmonic balancer belt pully etc I just want the exact issue please thanks

 

[D.j. Holley]

The code was p0301 cylinder1 misfire

 

[KShef]

I'd start by pulling the spark plug on cyl #1. You can also pull the belts to see if the noise goes way.

Oil pressure is a little low. If that's cold start up you likely have a problem in the bottom end.

 

[D.j. Holley]

Alright I'll try that thanks