Ok guys I just changed my oil because it was really low. Before this my car would boost normally although it had a bit of knock. I did the oil change and took the car out and it ran much smoother but when I gunned it in 3rd gear I was getting a lot of backfire and my boost didnt want to rise all the way it peaked at about 15 (it usually peaks about 20 psi).

now before this I had gotten my car tuned not long ago. I never checked the tune because it ran fairly well. But I looked at today and the fuel map was set to 12.5 throughout most of the fuel map during high load area. My car runs 91 oct. so I immediately thought this was wrong and threw back on one of my old tunes.

The car runs much smoother now but there is still a little bit of backfire in 3rd gear. Im getting almost no knock on my pulls though its just backfire but I can still feel a loss of power from this.

I uploaded some evoscan logs that I took while this was happening. You will notice they all have 0 knock except for one that has high knock but Im not sure what that one was about. Some of the logs were done in second and in third gear. The logs dont include afr unfortunately but from looking at my wideband the afr stays in the 11-11.6 region.

I feel like my old tune may still be running to lean up top but Im not sure. An ideas or thoughts?

 

Common man, this is happening at full boost only right? In power, probably around peak torque/peak boost the worst right? Your blowing your spark out, plugs are shot. Get new plugs or close the gap.

 

Yea I was considering that, I just thought it was weird for them to go bad that quickly. Ill check them tomorrow and your probably right I just found it odd for it to appear so quickly.