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Thread: 16144288 TBI ECM upgrade to 16168625 TBI PCM

  1. #1
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    16144288 TBI ECM upgrade to 16168625 TBI PCM

    I am very new to the tuning community and am grateful for sites like this one...which is so appropriately named. As an old school hot rodder, I know absolutely nothing about EFI tuning. Anyway, the main reason for my being here is I need help and education.

    My current project is restoration/modification of my '92 4x4 S10 with a 700R4 trans. The 4.3L V6 has been overbored .020 and fitted with flat top pistons. In addition to the Marine cam, the motor is topped of with '96 Vortec heads and an Edelbrock 2114 carb intake which requires an adapter in order to run the TBI. The ECM is a stock 16144288 with BCC BARL.

    When I was doing my research on what modifications to pursue, I found a thread on S10Forum titled "info on computers found in 1st gen's" that suggested swapping out my stock ECM for a PCM. The last paragraph recommended using Service No. 16168625. Well, like the author says..."for those who can't leave well enough alone", I bought and want to upgrade to a PCM. So, what I now need is how to:

    (1) reconfigure/repin the harness connectors from ECM 16144288 to accept PCM 16168625.
    (2) figure out what and how to reprogram the MEMCAL BCC BBMW or whether this BCC is appropriate for my modified motor.
    (3) get up to speed on EFI tuning...any suggestions on where to begin and what to read.

    Thank you in advance for any advice and assistance. Again, glad to be among you masters of EFI turning!

  2. #2
    Super Moderator dave w's Avatar
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    I've done several 16168625 upgrades. Here is a link to a write up I did a few years ago: http://www.gearhead-efi.com/Fuel-Inj...out-Directions! (RIP Eaglemark 1960 - 2015 http://www.gearhead-efi.com/Fuel-Inj...ead-Eagle-Mark)

    A link on how to remove pins: http://www.dynamicefi.com/RePinHowTo.php

    TunerPro RT software is what most members here gearhead-efi.com use to "tune" with: http://tunerpro.net

    Moates.net offers several options on how to "Burn" a chip. I would suggest the Ostrich 2.0 chip emulator (eliminates the need to purchase chip burning equipment) https://www.moates.net/ostrich-20-th....html?cPath=64. A Laptop computer using TunerPro RT software can upload the "chip" into the Ostrich 2.0. I would start with a BCC from a 1993 4.3 TBI engine if I were upgrading to a 16168625 computer.

    The factory (GM) did not publish a manual on how to reprogram / tune a PROM chip. The aftermarket fuel injection companies on the other hand want their customers to be able to "tune" their systems. Most all the information from the Holley Commander 950 .pdf applies to the GM fuel injection systems: http://documents.holley.com/techlibrary_r10149-7.pdf

    dave w
    Last edited by dave w; 02-21-2015 at 08:56 AM.

  3. #3
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    Dave W.

    Before going any further, I was sad to learn of Eagle-Mark's passing. From my searches, his name popped up a lot indicating his extensive knowledge base but, more importantly, his willingness to share and help others. I join all of you who knew him to extend my sympathy to his family!

    Next, thank you very much for responding and providing so many leads on how to get up to speed on EFI tuning. Now, I have a lot of reading. After leaving my above introduction and project description, I thought about some additional things I need to ask but don't need to since you've already listed many of them. In addition to removing pins and best chip burners and software, I still am not clear on what is the basic benefit of swapping from the 4288 ECM to the 8625 PCM? I understand, I can have someone (i.e., TBIChips) do a basic reprogram of my BARL chip to include the engine mods but are there bigger benefits tied the 8625's higher baud rate as well as extensive program-ability of features such as fuel tables and turning off/on of dual electric engine fans. I've only ventured into this arena because I didn't want to spend roughly $200 for a TBIChip and later realize I SHOULD have gone this route.

    Additionally, my '92 S10 is equipped with ODB1 which I have read is not very versatile and very archaic.

    Again, am I getting in too deep over my head for a resto-mod daily driver? For all of you experienced folks, please do not be afraid of being honest with your comments.

    And lastly, Dave W, did I see correctly in a thread that you offer services similar to TBIChips?

  4. #4
    Fuel Injected! jim_in_dorris's Avatar
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    HandyMan, I think one of the basic benefits of switching to the 8625 PCM is tuning. Because the baud rate is so much faster, you get more data points, making tuning easier. The $0D masks are decently documented, and like you said have the added benefits of doing things like computer control of cooling fans. Dave W. is one of the good guys on this board, and is a really knowledgeable tuner. If you want to get into getting your S10 tuned properly, grab a copy of TunerPro RT and start learning it. OBD1 may be archaic, but there is a lot of support for it, and it is much less expensive to tune.
    Square body stepsides forever!!!

  5. #5
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    Hey Jim, thanks for your comments. I guess I will press on with my ECM to PCM swap effort. At this point, before I move onto the repinning process, I need to secure a the proper harness connector. I found one on eBay...

    http://www.ebay.com/itm/261676184099...%3AMEBIDX%3AIT

    Can someone give me feedback if it is the correct one?

    Thanks

  6. #6
    Fuel Injected! jim_in_dorris's Avatar
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    They sure look correct. I just went to a JY and cut them out of a truck
    Square body stepsides forever!!!

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    Super Moderator dave w's Avatar
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    The items listed on ebay link are the correct parts.

    I usually purchase my parts from Mouser:
    http://www.mouser.com/ProductDetail/...%2f4ZAe21VE%3d

    http://www.mouser.com/ProductDetail/...lZCOa3cZvqE%3d

    http://www.mouser.com/ProductDetail/Delphi-Connection-Systems/12045889/?qs=sGAEpiMZZMs7eK6h2EBtKuUHqGbD0E771%252bY4d8n2LJ s%3d

    http://www.mouser.com/ProductDetail/...bkGFrG1l89I%3d


    http://www.mouser.com/ProductDetail/...XPzOh97SvHc%3d For 18 AWG Wire

    I can be hired (Old School EFi) to tune a chip for the '7427 PCM. Send me a Private Message (PM) for the details.

    dave w

    I like the newer 93 ~ 95 TBI red / blue connector PCM because it has two timing tables / two spark tables (near idle / off idle), can be configured to stream WBO2 into the data log, operate a 700R4 / 4L60E / 4L80E, and run an electric fan(s).

    Myself and other members have developed an advanced Excel spread sheet to "Crunch" tuning a '7427. see attached screen shots
    Attached Images Attached Images
    Last edited by dave w; 02-24-2015 at 06:15 AM.

  8. #8
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    Darn, I just tried to order the item on eBay and noted the seller doesn't ship to Hawaii...

    Dave W., thanks for the alternative from Mouser. So, do I order one of each of the first 4 items you list to make a complete connector? I'll also order a few pins.

    Now with regard to your last comment about advanced spreadsheet, that passes way over my head...

  9. #9
    Super Moderator dave w's Avatar
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    Quote Originally Posted by 57 Handyman View Post
    Darn, I just tried to order the item on eBay and noted the seller doesn't ship to Hawaii...

    Dave W., thanks for the alternative from Mouser. So, do I order one of each of the first 4 items you list to make a complete connector? I'll also order a few pins.

    Now with regard to your last comment about advanced spreadsheet, that passes way over my head...
    1 each 12110113
    1 each 12110115
    2 each 12045889-B
    2 each 12045890

    Pins 12146448

    The spreadsheet is for tuning / correcting the chip programming, we can post a thread later when it comes time to tune.

    dave w
    Last edited by dave w; 02-24-2015 at 05:48 PM.

  10. #10
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    Hey Dave,

    I don't see 12110114 in the parts list; when I click on the second item in your list above, it comes up as 12110115 and not 12110114. Just checking to make sure I get the right parts before I put in my order.

    Thanks for the amounts to order.

  11. #11
    Super Moderator dave w's Avatar
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    Quote Originally Posted by 57 Handyman View Post
    Hey Dave,

    I don't see 12110114 in the parts list; when I click on the second item in your list above, it comes up as 12110115 and not 12110114. Just checking to make sure I get the right parts before I put in my order.

    Thanks for the amounts to order.
    The correct part is 12110115.

    I've corrected my previous post.

  12. #12
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    Thanks Dave, I just ordered it. It should arrive in a week.

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    OK, received my connector order from Mouser today. Now, I'm ready to start re-pinning. As I understand, I am removing pins with harness wires from my 4288 ECM connector and inserting them into the locations in the new connectors for my 8625 PCM. Basically, according to the information in the thread "1227747 to 16197427 Conversion PCM Swap with Wiring Pinout Directions!", pin A1 from the old connector goes into F6 in the new. Correct?

    Do you have any suggestions on the best tricks to follow? Should I mark and label each wire? What else?

  14. #14
    Super Moderator dave w's Avatar
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    Your are correct with the process of moving the connector pins, A1 is moved from the old connector to F6 of the new connector.

    Be patient, sometimes the pins can be stubborn to remove. Having new pins available is a good plan, just in case a stubborn pin is damaged during the removal process and needs to be replaced. The first time I did a conversion I labeled everything. I made masking tape "Flags" to label the wires. I used black ink to label the old connector pin number, then used either blue or red ink on the other side of my masking tape "Flag" to indicate the new connector pin. I used blue ink for the blue connector pins, and red ink for the red connector.

    Double check and triple check the connections, before starting the engine.

    dave w

  15. #15
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    Ah....good idea! That is the kind of tips I definitely need to NOT mess things up.

    So do you think the current BCC BBMW in my 8625 will suffice for start up purposes? What do I also need to do regarding the notes?

    Thanks for your help thus far Dave...it really is nice to have helpful and knowledgeable folks to guide newbies like me along.

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