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APU1 & Modified 27SF512 Cannot erase

MNorby

MNorby

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When I tuned my TBI 454 I was able to erase and burn chips no problem but now trying to do ssyork's tbi rig and when I take one of our modified 27SF512 chip (modified as seen here: http://www.binderplanet.com/forums/showthread.php?t=80053) and in tunerpro rt using the moates I/O or even using the stand alone Moates Flash and Burn when I hit erase it says "erase succeeded" but when I do a blank check it says "chip NOT blank.". I have the chip addressing set at 00F00 - 00FFFF and the buffer addressing at 000000 - 000FFF, which is default when you load a 4kb tune into buffer and what everything online says. What am I doing wrong here? When I read chip then edit buffer there is data from 0000000 to 00000FF0 and all 00s to the end.
 
On the internet anything is possible! Take this for instance?
http://www.youtube.com/watch?v=ZsQSlNtzLcA

First, it's just wrong... it may even work most of the time, but it's still wrong. OK, let's move on...

You may have damaged the chip soldering a wire onto it? Yes I know it works, I also know it fails.

Also wraping the wire around the chip causes electrical interference. RF noise.

Just putting a piece of wrong tape causes a chip to fail I found when I used a piece of duct tape to cover UV hole when I ran out of stickers. Drove me nuts. I pulled off the tape and it worked. Was not even touching a leg? Not even close, just enough to cover UV hole on a brand new chip! You have a wire, mine failed from just tape?

You may have bought chips off eBay that are cheap counterfit knockoffs? There is a warning about this on Moates site. Many people have tried to save a buck, really, one buck and got chips that may work, sometimes. I get mine from Moates and never once have any failed!

If you erased the chip and it's not blank well somthing is wrong even if it was a good chip?

Another one that drove me nuts is The Moates Prom I/O in TunerPro or just Flash and Burn does not always set to default/correct offsets when you click on the chip! If you have changed things before? What you have above for offset setting is missing a "0" Then when you change one to correct the others move, have to watch they are all set right in the end.

Bin needs to go on end of chip, if you have 00s on end it sounds like you got the bin in the middle...or part of it in middle, did it verify once written?

Here's the correct settings for a 4k bin on that chip from Moates site.
http://support.moates.net/2010/04/05/programming-chips-using-offsets/


4k (4096) 27SF512

Buffer
000000 -> 000FFF

Chip
00F000 -> 00FFFF

Hope it's just the missing 0 for ya! :waytogo:
 
Last edited:
yeah, I have it set to the offsets on the moates site. I even tried offseets for the other file sizes too just to see if anything would delete. We bought a handfull of chips and the first couple worked fine, one is in my rig and one is in chevyman_400's. I may take an unmodified one and burn the tune to it then solder on the wire and see if it still verifies.
 
well I just took a virgin chip, burned tune, modified pins, and verified OK. I am scared to try to erase it for now until he drive on this tune and see where we are.
 
finally got a tune on ssyork's rig. Still have a few chips that won't erase but figure bad chips. Also found out his plastic chip holder that we have to cut to fit the 28 pin chip was broke and not engaging the socket properly. Hope all is well again.
 
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