Hi Sheppy.

More info on the activity led here: http://www.fuel-saver.org/Thread-Digital...7#pid29317

You should start at 200 mv, incrementing by about 50mv until one of the following occurs:
no gain in mileage
CEL (check engine light)
loss of power or other driveability issue

(05-18-2009 06:54 PM)colchiro Wrote:  I'd be very rare to find a wideband o2 on many pre-'97 vehicles and certainly not on a '93 so you can forget about that model.

I see no reason why you can't use the digital efie. While you're waiting to hear from Bruce, check it out. link

Between Bruce and Mike this was a surprise. My 09 Ford F-150 has a wide band on the two front O2 and narrow band for the post cat. Good thing the wiring diagram sent by Mike was easy to read the support from Bruce. My 09 is now a "Green Truck" I am still playing with the two rear sensor I started out with 200mv then called and it was recommended between 250-300mv. I set it at 275mv the Engine light came on.

Earn cash while saving gas!!! http://bit.ly/8giwLu