1988 Ford Bronco 2 with a 2.9 L, V6

by Walter H. Eason
(Anza, California, USA)

I have only one oxygen sensor upstream just after y before cat none after cat. This is a California truck smog tag and unit do not need a EGR valve. I have a Hydrogen system installed and am losing about 5 MPG. which EFIE unit would be best and is there an map enhancer also that would work also for this unit. Not sure if it is frequency or voltage controled.