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Thread: Chips in a OBDII PCM?

  1. #61
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    They're code names. I need the secret decoder ring though.

  2. #62
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    If you can really write the software to read/write I can give you what needs to be done?
    "can" is a far cry from "will," so exactly what do you mean? I suspect we all grasp the concept, there are plenty of descriptions of 'what needs to be done' floating around. There is a guy on another board that started some work already and we're PM'ing.

    However, socketing still seems like a requisite at this point because I don't know of anybody other than the commercial players with working PCM-side code for the flash rewrite (bricking seems likely during development). Trouble is, once one socket's a PCM, motivation to develop the OBD flash capability diminishes significantly (as with dimented24x7).

    I have an older ELM-based cable that can pull codes and whatnot, but I haven't played with it from Linux yet to see what all it can really do. Even if it's painfully slow, I'd say full read/write capability would be worthwhile if it's "possible." I'd have used this option by now if it was out there.

    24 hours to re-flash is my concept of painfully slow. For simple VATS delete and whatnot, _any_ timeframe would be acceptable for plenty of DIY'ers that can't/won't pay for efilive/hptuners.

    UPDATE

    Have a few chips on order from China, should show up in march. Will bump when I have capability to play (programmer, sockets, etc). My L31 is under the knife, but I'm probably going to slap it back together on the cheap for now so I still have reason to play with the 4.8 I have tucked away..
    Last edited by helo; 02-21-2013 at 10:33 PM. Reason: chips on order. we'll see...
    '89 suburban. D60/aam10.5/4.10/32's, L31-tbi/gmpp/eccc-4l80e, $0d or $0d_maf_egr.asm

  3. #63
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    sure don't look like ZIFs, but these might work...

    http://www.chip-service.de/product_i...0Yamaichi.html
    http://www.chip-service.de/product_i...20Meritec.html

    they also seem to have replacement PROMs....

    this info was grabbed from delcohacking, this thread: http://delcohacking.net/forums/viewt...=2346&start=10
    1995 Chevrolet Monte Carlo LS 3100 + 4T60E


  4. #64
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    I've broken one of those Yamachi style sockets before, trying to get at a chip. I'd never seen anything like it before . I searched for a few hours for a replacement and for the life of me couldn't find anything like it. Thank you.

  5. #65
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    Funny how many sop44 chips are on ebay all of a sudden... I couldn't find ANY only a month ago.

    A bare psop44 socket P/N: OTS-44-1.27-03
    (available on ebay 15pc/$135)

    Here's a badazz ZIF for a flash programmer. Best looking ZIF I've ever seen, but probably not easy to hook up to PCM even if they'd sell the bare ZIF socket.

    http://www.ebay.com/itm/HiLo-All-11-...item53eb7ce16f

    "HiLo All-11 PSOP44 SOP44 ADP-29F800 29F400 29F800" sold by "tube_buyer" $135
    Last edited by helo; 02-22-2013 at 06:03 AM. Reason: china. ble.
    '89 suburban. D60/aam10.5/4.10/32's, L31-tbi/gmpp/eccc-4l80e, $0d or $0d_maf_egr.asm

  6. #66
    I wouldn't use any kind of ZIF for a ECM/PCM, they are very unreliable and will cause a lot of malfunctions to the car because of vibrations.

    I have used many zif adapters for years and they are only for temporary use, not suitable for a permanent install. You always have to wiggle them and test the contact until you get a good contact between pins and adapter.
    The PCM flash chip must be soldered to the board or inserted in a PLCC/DIP socket or Pin Header to make good contact.

    I have the skills and equipment to do any test, if you need help for the project I may be of assistance.

  7. #67
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    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
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  8. #68
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    Trying to muck about with SMT ZIFs is going to be a nightmare. More to the point - we are reinventing the wheel here. There is already chipped 411 product on the market - the Roadrunner. Moates doesn't make it (the adapter), it's a generic header format, but the point here is you can order everything needed from Moates' site:

    http://www.moates.net/roadrunnerdiy-...der-p-119.html

    There's a female pin header/through hole solution, so an adapter board for more vibration friendly through hole 32 DIP sockets (27x040/27x080/etc) or PLCC carriers . Ostrich 2.0 will support 512k binaries and map tracing, worst case, needs a socket booster.

    FYI, Moates now makes an adapter board for using a RR on a Bosch ECU... hrm.
    Last edited by mekkis; 03-22-2013 at 01:48 AM.

  9. #69
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    Looks like what you guys are after is here:

    http://www.obd2tool.com/category-24-...and+Chips.html

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
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  10. #70
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  11. #71
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    Alright, last idea for someone smart... make a USB flash drive that hooks to moates header or something to replace the chip in PCM... no more taking the PCM apart, just run the USB cable out and flash it.

    Attached Images Attached Images

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
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  12. #72
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    That is a very interesting idea.

    dave w

  13. #73
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    .... so the adapter that Moates supplies is attached to the board, plug in the USB board(or maybe a ribbon cable?) on top of that, run the wire out of the case to have the PROM remotely mounted?

    or did i miss something?
    1995 Chevrolet Monte Carlo LS 3100 + 4T60E


  14. #74
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    This is the header that replaces the chip in 0411 and the RR attaches to it.
    http://www.moates.net/roadrunnerdiy-...der-p-119.html

    Now we need something like above to attatch to header with chip that can be flashed by USB... that USB flash card would be inside PCM and a cable run to passenger compartment for laptop... so how about NVSRAM on the USB stick?

    It's simple! I'm a genius! Just need someone smart to do it...

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
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  15. #75
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    512KB of 16bit NVRAM?

    http://www.cypress.com/?id=3490&addc...184=512Kb+x+16

    that might be what you're looking for. now to program it....
    1995 Chevrolet Monte Carlo LS 3100 + 4T60E


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