Our Euro 944's DME is 1.1 (no O2 sensor), ours is 1.2 (w/limited O2 sensor use), the E30's have version 1.3 according to Ranger. Maybe 1.3 has long term fuel trim?

Is that true for all model year 944s?

Bottoz wrote:
Nothing Wilke wrote would cause me to draw the conclusion that LTFT is meaningless. He's simply describing the open vs. closed loops maps.

I think so. It appears the change to '88 ECU was a chip & a jumper, and they can be interchanged http://www.the944.com/88_to_86.htm

---------------------
I don't see any feedback loop to the original maps, but I'm in over my head here.

BJ, Dave?

Anyone know what the difference bewteen Bosch DME 1.2 & 1.3 is, or any more input on this?

I'm sure LTFT is something the DME uses. But, when all power is removed after each race, then there is no LTFT stored... right?

Bottoz wrote:
Yes. For good or ill LTFT is reset when power is removed. And I don't know how long it takes for the adaptation to return. The e36 and e46 require only seconds, but it might be a mistake to draw conclusions from later systems.

Re. Motronic 1.2 or 1.3. I think the DME became adaptable at Motronic 1.1. Thats what my e28 (80's BMW 5 series) buddies tell me.