This only happens crushing from 5-50mph. At any speed between those two points crushing in any gear. Anything above 50 she's fine bouncing from 14.6-15.1. When it does do this I obviously let off and get back on than gas it to maintain speed and proper afrs. I also cleaned all sensors etc. changed air filter (non oiled filter). Still does it

http://www.youtube.com/watch?v=yX03uuhUoio&feature=youtube_gdata_player

 

How long have you had the wideband and what do you have for a tune...

 

looks almost like "lean burn" it is a tactic to increase your fuel mileage while you are cruising. Chevy used to do it stock in the 90's. but then they stopped because doing this increases emissions.

i would talk to your tuner and see if that is what they are doing.

 

Do you have a scan gauge to log your LTFTs and STFTs?

 

No dice my tuner sold his hpt and moved onto a Evo. Also you can feel it pulling timing so it's def not that lean burning or whatever

 

Bump

 

Buuuump would it be my secondary o2? If so where can I get that part at?

 

No it wouldnt. 2nd O2 is for making sure your cat is doing its job.

 

I think I said it wrong. I am catless with a wideband. So would it be my upstream o2? (not on the dp)

 

Mines weird too. If i let off but dont let DFCO kick in and then get into it, it will go lean then come back to normal.

Also car likes to randomly go lean when sitting at idle (wont happen if A/C is on)