Wide band real lean at idle with dumped exhaust ??
My wide band is in the h-pipe just past the pass. shorty header and I am getting some weirdly lean #'s like 22-23, at idle, I have 2.5" h-pipe and 3" ultra flows into dumps, Does this sound typical with a short exhaust system ?? I only use this wide band once in a great while and used to be able to just run it up in a tail pipe with success so I am suspecting my sensor is getting fouled, it does clean up at higher rpm's and seems logically correct. My unit is a dyno type big box wbo2 system and I just ordered a new innovate MTX to replace it ??
As a secondary question, will I get more stable or accurate wbo2 #'s if I place my bung in a selected leanest header tube rather than the collector ??
First car when I turned 16 was a Brand New 1979 5.0 Coupe and my current car of choice is still a 1979 5.0 Coupe, just not new anymore...
Last edited by 1979 5.0 Coupe; 04-27-2015 at 08:52 PM.