My 88´TransAM TBI has an ECM 1228063 with the "promcode" AMXZ.
Now, I want to fit an EBL to my car. Therefore I bought another 1228063 ECM in ebay because i want to leave my original ECM in stock.
The ECM from Ebay need the Chipcode AKRK but I bought it without prom. Ok, I moved the AMXZ prom to this one. Then, I had the troublecode 51 - PROM Error. I need an AKRK-prom. Now my questions.

What´s the difference between AMXZ and AKRK ? Can I fit the EBL to this AKRK-ECM and use it with an AKRK-BIN ? Can I generally use my car with this AKRK-ECM ????

 

PROMs first: AMXZ and AKRK are both for the same vehicle with the same ECM ('88 f-body with a L03 and auto, Fed emssions). The AMXZ is a newer release of the calibration. Most likely to fix some sort of driveability issue.

The AMXZ PROM should work in the ebay '8063 ECM. If it doesn't then the ECM may be bad. Double check that the socket contacts in the ECM are OK. And that the PROM was inserted and seated OK. If it gives a constant SES or flashing SES then the ECM is most likely bad.

A code 51 can also be caused by doing a key-on without the PROM installed in the ECM. Can unplug the ECM for a moment to clear the code and try again.

A rapidly flashing SES is a sign that the PROM is bad or that the ECM can't read the PROM.

Another test: at key-on, engine-off, the SES should turn on, blink off, then turn on solid. It MUST do the blink for the ECM to be running from the PROM.

RBob.

 

Sorry, but I´ve forget to say. The engine runs but the SES is flashing rapidly.
Do you think, i can fit the EBL to this ECM ??? If it´s only from the prom, i don´t need this chip again with ebl.

 

If the AMXZ PROM works in your original ECM, but gives a rapidly flashing SES light in the ebay ECM, I wouldn't use that ECM. Without knowing that the ECM is OK, why risk installing a board that may need to be removed.

There are a couple of other possibilities of regarding the ebay ECM. One is that the cover was swapped and it isn't really an '8063 ECM. It may be a '7747, '8062, '8747, etc.

There is a way to ID an ECM by the numbers on one of the chips inside. I'll post back later on which chip it is (need to find my notes on this).

Another possibility is that the socket is bad. In this case the ECM may still be used for an EBL setup. If you can get another PROM the socket can be removed and the PROM tack soldered in place. Then see if it runs OK. If it does then you can use the ECM for a conversion.

RBob.

 

Ok, today, i´ll remove the housing from the ecm. I´ll take a look to the socket and i´ll fit another prom. I hope, it works ! If not, i must buy another ECM :-(

Now, i looked to "my ebay". The ECM is from an 88´camaro TBI.

 

I mistakenly posted '8746 above when I should have posted '8063. Fixed it.

I don't have the ID for an '8063 ECM, however I have it for a handful of others. So, if you can post the info from the U7 chip I'll see if it matches any of the others I have.

Chip U7 is a large 40 pin DIP chip. Second one out when starting from the center of the PCB. Should be marked on the silkscreen.

Usually has three numbers on it: a 3-digit manufacturers code, then depending upon the manufactuer a 5-digit (large) or an 8-digit number. Then either a multi charactor code or a 5-digit (small) number.

If you post these number up I'll see what I have.

RBob.

 

Ok, i found the chip U7:

185
16066093
DQ8726A

These numbers were everything what i found on this chip U7 !

Thanks a lot !

EDIT: The ID is $4D on 88´TBI cars...

 

This is the chip #: 16066093

Being an '093 isn't helping, as I don't have that number in the chip # to ECM list. So i don't know what ECM it actually is. However, it is still possible that it is an '8063. The reason is that I do not know what chip number that particular ECM uses.

I can say that it isn't a '7747, '8746, ' 8062 or about 10 others that I have the chip numbers for.

RBob.

 

Today, i did fit another chip to the ebay-ECM but it was the same. The SES-lamp flashed rapidly. I don´t want to go with this bad ECM.

My stock ECM worked very well all the time. I don´t want to have any problems with the car in the future. Now, I did fit the ebl to my original ecm. I think, it´s the best way to go because i know, this ECM is 100% OK ! The installation was very easy to do. It was a nice job. Tomorrow, i´ll fit the ebl-ecm in my car. I hope, it works.