Mustang mass air flow sensors

[Nate]

On Wed, 2 Nov 1994, Jim Conforti wrote:

> 
> Does anyone know anything about the Hitachi air mass sensors used on
> some of the mustangs ..
> 
> They have an analog voltage (v. PWM) output to the ECU ..
> 
> Any info/specs greatly appreciated
> 
> I'm going to interface this sensor to the Bosch Motronic system

I went through a whole bunch of Oxygen sensors (if that's what you are 
taking about) and they are all 0 to 1 V types mostly. Some have two wires 
so that one is a ground reference, some silly cars use the chassis ground 
for the signal, really stupid on a 1V sensor signal!

I tested it by putting it in a vice and blowing my propane torch at it. 
you have to heat them up to 700 degrees or more for them to start 
working, then if you hold the propane torch close to it, there is NO 
oxygen available and it will read out as such.

They are fun to play with, I added some electronics to minitor my car's 
electronics, and I'm convinced that these guys either didn't spend more 
than 2 minutes writing code, or they want the darn thing to only get 40 MPG.

I bet with some mods and good programming you could get 70 MPG out of it!

(well, I may be pushing it a bit...)

Oh, I called all over and tried to get these technical types at the car 
parts places (factory) and they don't know what a Volt is. They were 
giving me all sorts of crap about it giving special types of pulses and 
stuff. Geezzzz, I guess they think we are all really stupid. Put it on 
the bench, get it hot, and it works. Even their little circuit exposes 
how it puts out the voltage.

Most of these guys had no clue. America is in trouble