7730 Memcal ?
01-13-2006, 06:39 PM
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7730 Memcal ?
I just got a brand new memcal from the chevy house the other day and I opened up the top and it is a "AUJP 1615 1348" problem is, it has no UV window on it and if I read it as a 27C256 then it opens fine as $8D in Tunercat. If I read it as a 27C512 then the file won't open in TC as it says it is the wrong file. The chip says "M27C512-12B3" It is an ST chip. Haven't seen this one before. I am using a Willem's PCB3 programmer and I am not sure how to erase it or what to read and program it as correctly.
01-14-2006, 06:43 AM
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Car: check
Engine: check
Transmission: check
This is only the second time I've heard of GM using this style chip. What you have is an EPROM in a plastic package. Short of xraying it you can't erase it. You will need to either remove that chip and put a Flash chip or EPROM in it's place. Or use an adaptor board.
The up side is that you have a good stock starting BIN and the correct knock filter and limp mode calibration pieces.
The reason these chips are available is cost. They are a lot cheaper then a hermetically sealed ceramic package with a quartz window.
RBob.
The up side is that you have a good stock starting BIN and the correct knock filter and limp mode calibration pieces.
The reason these chips are available is cost. They are a lot cheaper then a hermetically sealed ceramic package with a quartz window.
RBob.
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