2011 GMC Yukon Denali

[csharp812]

so i recently got bought this truck and it idled really rich and stunk. So i went into dialing in the maf got that close and went into tuning VE. I am getting closer but i wanted someone to check it out and make sure i am on the right track.

Thanks for the time and any help.

23-12-23 17-17-23.hplDenali_speed density torque.hpt

[GHuggins]

Is the engine modified to need tuning or is it a problem with it? What are the build details?

[Ben Charles]

My guess would be cam and free flowing exhaust (will always have some form of smell to it)

[blindsquirrel]

14.5 on the wideband while both narrowbands are pegged out dead rich at 900mV is exactly why you should be tuning this in closed loop with trims and forget about the damn wideband until you can get it to read right.

[csharp812]

Is the engine modified to need tuning or is it a problem with it? What are the build details?

Yes its modified. Unknown cam long tubes 3 inch exhaust. I plan on degreeing the cam to get close to knowing what i have.

My guess would be cam and free flowing exhaust (will always have some form of smell to it)

I understand that, it felt sluggish and down on power like the whole map was rich.

14.5 on the wideband while both narrowbands are pegged out dead rich at 900mV is exactly why you should be tuning this in closed loop with trims and forget about the damn wideband until you can get it to read right.

I may have not set it up to do VE properly. When i was doing the maf the narrow bands read properly. But i will turn on maf and stft ltft back on to get it the rest of the way