ManBearPig
Well-Known Member
- Thread starter
- #1
My car has 7k miles, and has been tuned since 5k. I had to reflash the stock tune for a very brief period of time, and since I have flashed my performance tune back in, Ive been seeing positive knock at part throttle; Something I have never seen before. Now while its possible I may simply be more aware now, I don't think that's the case. I tend to watch my ngauge pretty closely and don't think ive ever seen any positive numbers before. I have sent my tuner some logs and they say everything is fine, and that knock under partial throttle is normal. I'm not so convinced as I'm pretty confident i've never seen this before. I had another knowledgeable member here review the logs and recommend I check the plugs as one bank was a few percent richer than the other under certain conditions and a weak spark could attribute to that. I put a new set in and nothing is any different. Mostly the positive number will flash briefly at throttle tip in after a shift. Occasionally it will stay positive for slightly longer, maybe a full second or two. After a positive value it always switches to negative and continues to add timing as I accelerate harder. I never see positive values at WOT, just as I touch the pedal after a shift. It isn't terrible consistent, but happens often enough that it bothers me. I have not recently made any mechanical changes, and I'm confident the knock is not false. Ive checked and rechecked every exhaust component to make sure its not close to anything. I suppose my next step is to get a bottle of octane booster to see if that will make the knock go away. If so...whats my next step? My concerns are that this seemingly started out of nowhere when I flashed my tune....I have also flashed back to stock, and back to my performance tune again to make sure nothing was somehow corrupted. Are there any mechanical abnormalities that can cause something like this? My tuner doesn't seem like they think its a big deal, but I wonder if they could modify my tune anyway? I'm hesitant to request that though, as the sudden onset makes me suspect something not tune related. Anyone else experience anything like this?
I suppose I'm just rambling now but any insight is welcome
Thanks
I suppose I'm just rambling now but any insight is welcome
Thanks
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