Hello Scotty,

I am in need of help. I have a 2015 chevy cruze 1.4 LTR with 92,000mi(automatic) and about 3 weeks ago I started to hear an unusual ticking sound coming from the engine as well as poor fuel economy and gaseous scent coming from my vents. After a week the CEL came on so I scanned the code at a parts store and had a code related to the knock sensor failing/low fuel pressure causing engine knock(sorry I don't remember the code number). I replaced the sensor and the light came back on. I figured maybe the sparkplugs were due to be replaced, so I did and that was fine until the light came back on. I did notice this spring was really loose in cylinder 2 on my coil pack and black carbon was around the rubber. Would a faulty coil pack cause engine knock? What do you recommend I do. 

Thanks in advance, Luis