merlin.oz

I was having another look at thes maps, and was struck by the similarity to my old Starion fuel maps.
This was MAP sensor driven for load, table data in milli-seconds.

If you divide the map values by 10, the numbers look very like injector times in mS.

Could they be some kind of limp-home map?

Ph3n1x

iTrader: (12)

We simply don't have a definitive answer. But they are definitely no "knock maps"

jcsbanks

Mattjin has done most with these, I think they were thermo duty maps/fan control etc.

Mattjin

There is a limp map but it isn't one of the old knock maps. Rather it is located close to the Fuel Primer and Post Start maps and is a small 3D table.

The older knock maps were vastly different between the earlier Evo7 default xmls, and the Evo9. For the 7, the old knock maps were mostly EGR duty and Purge Control. There are a few 3D tables that seem to be common to all of the early Evo's though. On my rom it was listed as Knock Filter 1, and there is a thread by Acamus talking about this. The other is knock filters 4,5 and 6. The purpose of these maps still eludes me.

There are some functions we haven't even touched on. The alternator is controlled by the ECU and nobody has found a single map yet that has anything to do with this function.

dan l

iTrader: (3)

The alternator could very well be controlled in the same way the O2 feedback is controlled, without a table. The ecu just wants to keep the system voltage at 14v.

03whitegsr

iTrader: (8)

I think there is a little more in it then just maintain 14V. Ever since I changed my alternator the car drops the voltage at idle to 12V. It’s on on-off type thing and bringing the revs above 1100 RPM will turn the alternator on every time very predictably. Comparing the old alternator to the new one, the pulley is larger on the new one. Either something else is wrong, or the difference in pulley size was enough to make the ECU not so happy and causes it to turn the alternator off at low engine speeds.

dan l

iTrader: (3)

Sounds like something is wrong. If you read the FSM your car is supposed to maintain 14volts at all engine speeds. Also my car holds 14v a idle, cruising, or high rpm.

EDIT;

also its not an "on off control". Its a variable control, I'd have to look but I r emember it being a 0-5v control on that regulator with a ground connection on the regulator for your reference.

acamus

What I can tell is that the values are used on timer, so it does something in timely fashion (maybe coil charging? or injectors?) maybe some of tuning gurus can tell from logging. associated MUT requests are D6,D7... E0.

Mattjin

Maybe some end of injection timing maps? We will need to scope these to find out though.

Same for the alternator... it will be a difficult one to spot.