Truck knocking
#1
Truck knocking
Hey guys as some of you may know i drive a 99 dodge ram SLT 5.9. I got the truck last year from an old man and it had 38K miles on it. It currently has 46K and since I've had it its had a small knocking noise when I accelerated until about 45 mph. I thought it was the plenum possibly, but when i checked it was clean as a whistle. The other day I put in premium for the first time since i had it and the knocking went away. My question is, is the reason because of the higher octane? I don't know much about engines so I don't know if this is the reason. Based on how well the truck is driving since I've filled up I will def. be using 93 now instead of 89.
#3
#6
I suggest you remove the TB and look in the corners for oil pooling. Also if the precat o2 has never been changed there is a good chance the cat is getting clogged from that, let alone the plenum.
#7
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#9
Ok I'll pull the TB and recheck and I'll clean it while I'm at it. I will hopefully be replacing the Plenum within the next month or so. While doing more research I saw the end all plenum thread and I will be pulling the precat o2 sensor and see if I notice a difference and whether I need to replace the cat. while watching the video that was on that thread the guy mentioned that if your vehicle has less than 70k miles or is less than 7 years old that I can get it replaced because of the federal warranty. Will this apply to me since my truck only has 46K on it or do both requirements have to be filled?
#10