Running Lean?

[mikebart101]

When cruising down the highway at over 55mph air/fuel ratio reads 14:1 which is great, but when I let my foot off the gas to coast air/fuel ratio shoots up to 18:1, probably even higher but gauge only goes to 18. I dont know if this is normal. Seems pretty damn lean to me. Only does this when I'm not giving it any gas at over 55. Any input would be awesome.

 

[pacecarta]

it should go lean , theres no need for fuel on decell and the injectors practically shut off . if you watch O2 mv youll see it drop to near zero on decell , in lean idle cruise where you dont need much fuel it will dip into the low 100s

 

[2QUIK6]

Yep, just pay attention to your BLMs, if they are within 15+- of 128 it should be running fine. Should not be concerned about coasting DE fueling.

 

[mikebart101]

Thanx for the input