The display driver they have on there that you can get for free isn't really free because of what they call a 'high demand' for the product samples. National charges $9 for one unit and I think $15 for 5. I got three of them(should have gotten 5).
But you know, looking at the circuit they've put together there, that's simple as hell. AND www.st.com offers free samples of the LM311 chip used in it. I've got 3 on their way!
Yea i think your right, the wideband 02 kit is the way to go becusae you can watch real time air fuel ratio, also if i plug my air fuel guage to my narrow band 02 its going to be off anyway becuase the efie is hooked into it now so i can lean the jeep out with adding the HHo and if i lean and richen the 02 sesnor that guage would be off right.
Also as for a lean alarm you dont need that becuase you can just watch the guage for going to low, as for closed loop how do you know the car is in closed loop if you have obd1 and cant monotor it.
95 JEEP CHEROKEE XJ
OTHER FREE MPG THINGS TOO