CeC technical information?

I did not actually see the previous mention for the cost of the connector, however now that I know it's....unpleasant. There isn't really much of a work around then except for as you mentioned harvesting existing ones off other CeC's working or not. I think it might just come down to begging the off-roaders to sell their modules if they've removed their system.

My bad if my thought on the fuel tables was wrong. First time really digging into this so I'm trying to still weed out modern car talk from computers and ECU's because MAN every time I expect this to be something complicated it's just something even simpler.
Hmm, perhaps there's a way to just initialize the microcontroller with a different idea of what the "ideal" air fuel ratio is? This may require a little bit of experimenting.

Here's the official stance on how the stepper motor works in the 2BBD. Keep in mind that stepper motors are typically rated for tens of thousands of hours before failure when they are sealed like this. More than likely poor performance of the stepper motor itself can be blamed on lubrication that has gummed up with age as opposed to bearing wear or an open winding.

My current driver, a 1980 Concord, has 2 key things hanging off the carb, a throttle 'kicker' that cracks open the throttle at idle when the car is in-gear or with the AC on, and choke is fully off; and a very simple throttle position switch which is looking for an open/closed condition only. I'm guessing that goes to the computer to help it agree with what the 02 sensor is sending it

The first item is the Idle Speed Control Solenoid, or "Sol-Vac". It's a whole circuit that simply bumps the idle up for certain load conditions like you specified, plus can be computer operated when necessary but is not related to O2 sensor operation.
The other item is the Wide-Open Throttle switch. Its only purpose is to tell the computer when the throttle plate is within 15 degrees of being completely open. There's more on this below.

maybe altitude and temperature (warmup) compensation? that stuff is slow moving.

Altitide control on the 82 CeC is controlled by a jumper that is either grounded to indicate you are operating above 4000 feet or tied back and not connected to anything, indicating you are working anywhere below 4000 feet. Remember that this is all-digital so the computer can only receive a YES or NO when it is looking at any sensor (excluding the O2 sensor). The computer does not monitor the status of this signal during operation, so it initializes accordingly when it is powered on.

Likewise the CeC has multiple open-loop modes it will go into depending on what the sensors are indicating when the computer is powered on. This will also affect where the stepper motor sits and remains while in open-loop.



Once all the sensors satisfy their requirements for closed-loop the computer runs a timer to verify everything remains above spec, then enters closed-loop and from then on it is reliant on the O2 sensor and begins full-time stepper motor operation.



I think I mentioned it before in the thread that a working O2 sensor is ESSENTIAL, otherwise you enter closed-loop and the computer will immediately stick you in a max lean or max rich condition which makes the engine run like crap.
A very VERY "you must read this" place to read up on all the related sensors above is http://gleebledorf.com/ It's more oriented for Jeep configurations but Eagle and similar AMC models use otherwise the same components.

Edited by MIPS - Jun/06/2019 at 11:37pm