I’m working on a 1990 Chevy Silverado 7747 ecu $42. I havehad a socket installed in the 7747 unit for a few years and had burned a chipwith the stock ASDU.bin program. Since then I have gone to TunerPro V5 and havemy old AutoProm replaced. (Hopefull not too many variables.) I think the oldautoprom was s/n 000050.
I got the Data Acquisition working 2 days ago but, can notget the emulation working. I pulled the working 29C256 out of the socket and installedthe AutoProm ribbon cable, making sure that the RED strip was on the number 1end of the socket. No chip in the AutoProm ZIF socket.
I put the TunerPro into “Emulating” (green) mode, Uploadcurrent bin to emulator, Verify (green) and then start the truck. SES on solidand I can tell it’s in limp home mode. I can Data log in LHM but, reads reallyoff. I can “Download current bin fromemulator to file” and the file looks the same as what I uploaded.
I also pulled my 29C256 into the AutoProm ZIF socket andread the prom, and saved it to a test1.bin file. Used test1.bin to emulate and I got the sameresults, LHM!
Pull the AutoProm cable back out and reinstall theprogrammed 29C256 form before and the truck runs fine again. I do havePassthru/AutoProm is in the AutoProm position and the other one is in theOpen/8192baud position. I also tried the 160baud/10k position but data loggingdoes not work properly in the 160position.
What am I doing wrong?
Thanks, Mark J.
Bookmarks