I was going to just try and tune this away with the VE table, but thought I'd ask first. Do you think this large variation in BLM indicates a problem? Specifically, the 159's at low idle. Does it look like it could be related to an exhaust leak drawing air to the O2 sensor at idle?

Thanks for any advice.

 

What mods have you done to your car? What kinda car is it? It could be a normal untuned car or it could be a problem it just depends on what you've done to the car.

 

The VE table is factory stock. It's for a mild 350 with Edelbrock performer intake, headers, no knock, and no emissions (no EGR). No other mods I can think of except open element air cleaner, if that matters.

The reason I have no good baseline is because I'm converting from a carb. I bolted everything on, and this is what I'm getting. I wouldn't expect such a discrepancy from a factory 350. The headers and open air cleaner might raise the VE across the board (?), but it seems odd that it's really lean at idle and not so bad at higher RPMs.