Memory dump of ECU

[Calum]

Originally Posted by b3lha

OK. You're probably right.
I got the formula by looking at calculations that the ECUedit guys were using to decode the fuel map on Imprezas with the next-generation of JECS ECUs.

It looks pretty dang similar to the Nissan (also JECS) ecus. On the older models (same era as SVX) when you translate the table from a multiplier to a target AFR value it ends up at under load not matching reality. Its not really important, you just tune for reality anyways and the fuel map is just numbers you adjust until the car is performing how you want it, but it saves getting the same question asked over and over again on down the road.

I would make the table just x/128 or whatever and show that as a base injection time multiplier.

Unless it does end up corresponding to reality, in which case the above is a load of hooey. Get a wideband (plug: go with an Innovate unit).