Just wondering if there is a way of manipulating the signal or voltage (which ever one it is) output of the AFM to lean/rich the fuel mixtures?

Just wondering if there is a way of manipulating the signal or voltage (which ever one it is) output of the AFM to lean/rich the fuel mixtures?

you could i guess, however, why you would want to is a bit beyond me.

The ecu of the magna is able to be 'unlocked' now so off the shelf tunes for extra power / economy are easily available

Ah ha, I am learning.. This is good. I presume my magna is factory tuned to run on the rich side of stoichiometric. I'd like to lean it up a bit if possible.

Ah ha, I am learning.. This is good. I presume my magna is factory tuned to run on the rich side of stoichiometric. I'd like to lean it up a bit if possible.

thats fine dude :)

Look into a steve knight racing tune (or SKR as its more often known around here)

Essentially you just mail him your ecu (not too hard to get out) and he 'unlocks' it, and puts a better tune on it which doesnt run as rich as the factory tune does, you also net a few KW

He can also do 95/98RON tunes or something more hardcore if you are into that

digital fuel adjuster
http://jaycar.com.au/productView.asp?ID=KC5385&keywords=fuel&form=KEYWORD
http://store.autospeed.com/Items/14449?&caSKU=14449&caTitle=Digital%20Fuel%20Adjuster

but also requires

http://jaycar.com.au/productView.asp?ID=KC5386&CATID=25&form=CAT&SUBCATID=347
http://store.autospeed.com/Items/14461?&caSKU=14461&caTitle=Hand%20Controller%20for%20Digital%20Adjust ers

or an SAFC I'm sure should work...

So can the ECU be found in the passenger kick panel like most other mitsu's and what would it cost me to get it re-mapped to run a little more economical?

i dont know if the jaycar one will work direct with Mitsu AFMs , they put out a frequency reference more than a voltage reference.
Silicon Chip magazine back in June 2010 , in the circuit notebook section , described a circuit for a Mitsu AFM adjuster. it takes the freq signal from a Mitsu vortex type AFM and converts it to a voltage that can be changed by a Jaycar Digital Fuel Adjuster , then converts it back to a freq signal for the ECU to process.

So can the ECU be found in the passenger kick panel like most other mitsu's and what would it cost me to get it re-mapped to run a little more economical?

When the ECU is operating in closed loop mode, it uses the oxygen sensor signal to adjust fueling and ignores the fuel map (other than as a starting point), and thus aims for a stoichiometric AFR. I don't know the exact RPM and load ranges where the ECU operates in closed loop mode, but expect that 1000-3000RPM and light to medium loads would be covered, which fits nearly all "cruise" situations.

Simply modifying the MAF signal doesn't achieve anything while the ECU is in closed loop mode.

What fuel economy are you currently getting? If the car has well over 100000km on it and the oxygen sensor has never been changed, the oxygen sensor might be dead which will cause more fuel to be used - especially if the car is operated mostly where the ECU runs in closed loop mode.