I have an NJ pajero 3.0L v6 1994

I think the ecu may be related to that of the lancer.. I have also heard rumours that playing around with the MAF signal has an effect on the timing

So I have a board that I use to modify the MAF signal by changing the pulsewidth. I disconnect the O2 sensor and I can then use the board to control the AFR

I just bought an LC-1 so I can now use that to set the AFR, I was hoping to use the MAF board to control the timing ?

Looking at the AFR the ECU seems to be ignoring the MAF signal when it is in closed loop but is it affecting the timing ?

Thanks
JB

Yes I am trying to run HHO in my car....

 

JB

I'm not sure I have a clear picture of what going on. However:

* the LC-1 is a sensor and won't actually change the behavior of the ecu in any way.
* regardless of whether you're in open or closed loop, the MAF sensor is used to calculate (or look up) how much fuel to inject.

On the evo, the MAF signal is used to calculate a load value. That load value is used to look up both fuel and ignition timings. No single sensor is going to allow independent fuel and timing changes.

d

 

thanks donour.. Just to explain a little.

I programmed the LC-1 to set a closed loop afr of around 16.5 instead of 14.7. This is an analogue output that goes into the ECU.

I have made a small computer board that I can modify the MAF pulse using a POT (I can also program in a curve if required so it can vary at different MAF frequencies). With the O2 sensor unplugged I can use this board to either richen up the mixture or lean it by turning the pot.

However with the LC-1 simulating the o2 sensor to my ECU I can no longer use my MAF board to influence the AFR. It just gets ignored no matter where I move the POT.

(update:- this is not entirely true, If I richen the mixture by 10% the ecu quickly jumps into open loop under moderate acceleration, it seems to have no effect if I lean the mixture by 10%)

So my question is that by changing the MAF signal, although it does not change the AFR, the ECU will see more or less Load than normal. Is it in fact using the load to deduce the timing ?
If so would I simulate More load or Less load to increase the timing advance ?