found possible another possible p0174 cause hope this helps

[kru510]

kept getting this ticking on the driver side and a p0174 code. Could not get a decent afr. Sits at around 12.1 at idle.Thought it was the headers leaking turned out to be a leaky egr gasket.

https://www.youtube.com/watch?v=LOIK1Iu-c3Q

 

[CSCOBRA03]

Great idea using the smoke. How did you make the smoker ?