AFRs randomly go lean or rich under wot

[aguiga]

so all of a sudden ive been having this issue where my AFR's will show 10.0 on my aem wideband at wot and then sometimes it will show 11.5. My AFR's are set at 11.0 what would cause such a random change in the AFR's like that.any ideas?

 

[PrimerPLus]

Exhaust leak, did it use to be spot on?

 

[aguiga]

Yes it was.its just randomly happen.
(update):i noticed when it went lean on my log it is targeting a higher load factor during boost n when it goes rich its targeting a lower load factor.so my wideband sensor is still working.so when i check the boost est at same rpm when it goes lean n rich it veryies a lot. What could be causing this inefficiency in load factor varying a lot.

 

[MY1GDSM]

You have Ecmlink... . Post a log in the appropriate forum and you will more then likely get more help then with vague descriptions of a problem in the newbie forum.

 

[aguiga]

i found out what was causing this issue. lower honeycomb from maf popped off and was crushed as it was trying to get sucked in.so replaced it and everything is working perfectly again