Wideband O2 Tuning

[WheelHorse]

Ok shes tuned up! Sorta

Cruise at 70 is around 14
Moderate load 13.7 (0-40mph light accel)
Cruising highway is around 14
WOT- 12.5-12.7

BUT- I still have my original problem at idle. Even if i blip the throttle.
I set the screws to 14.7ish, its great, throw it in gear, holds 14.7.. Drive down the street, that 14.7 changes to 12.8 every damn time! Clockwork!
If I shut down and let it sit, itll go back to 14.7 again (until I drive)
I called Edelbrock and the guy basically said “meh, i dunno man”

Needle/float? just replaced and reset
Fuel Pressure? 5psi
Step springs? silver, verified down in place
Idle screws moving from vibrations? Checked
Choke plate moving and richening the mixture?
I cannot figure this out!
Any thing I am missing?

So, when you leave the driveway, afr stays high 13's low 14's until you come to the next stop light where it idles rich at 12.8? When you tune on your driveway, is it level? I found my incline on my driveway causes a different afr from level.

 

[jdeignan]

Tuned it in a level garage��