Can't find right file to match my truck

Discussion in 'Engine Performance + Maintenance' started by dave s, Jan 29, 2020.

Car Parts
  1. dave s

    dave s Newbie

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    I'd like to get the right file definitions put into my TunerPro RT and try to start figuring this out but my truck isn't listed anywhere. Is there another file close enough to get started with I could use? My ECM number is 16171199 and the letter code is BFCF. It's a 94 with a 305 and a 5 speed and 3:73 gears. ECM.jpg
     
  2. PlayingWithTBI

    PlayingWithTBI Desert Old Guy

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  3. PlayingWithTBI

    PlayingWithTBI Desert Old Guy

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  4. texas tough

    texas tough OBS Enthusiast

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    Could he just replace the PROM chip?
     
  5. PlayingWithTBI

    PlayingWithTBI Desert Old Guy

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    The 27SF512 flash chip is a 28 pin EEPROM, the original 24 pin EPROM chips from then had to be IR erased and "burned", some guys over on GearHeadEFI still have the equipment to do it. The Moates Burn2 can read them but can't "burn" them. So, you'll need to adapt your Mem Cal socket to accept them. I THINK! I have a 7747 ECM that I had a ZIF (Zero Insertion Force) socket installed in it so I could flash my own calibrations.
    IMG_0725.JPG
    IMG_0726.JPG

    Here's another link that shows the 1199 AND the 6396 but no chip (probably was the 27C512) maybe the definitions for the 6396 will work for the 1199?
    https://xtronics.com/wiki/GM_ECU_eproms.html
     
  6. dave s

    dave s Newbie

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    Well I bought it new and my son in law said he never had it replaced while he had it. So I'm going to say it's what came with it new. I remember back in 95 buying a "performance" chip from Jet I think. I can remember pulling that box out and replacing the chip. When I sold it to my son in law I gave him the factory one. He doesn't remember if it ever got swapped out or what even happened to it. I guess I'll pull it out and see what chip is in there. Only mods I had done to it was JBA shorty headers, tbi spacer, deleted the cat, and I think I did something to the airbox between the snorkel and the fenderwell. I'll check it out and post what I find. Would knowing what chip is in there help things for me?
     
  7. PlayingWithTBI

    PlayingWithTBI Desert Old Guy

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    If you could download the .bin from them then you'd know for sure what you have.
     

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