Re: reprogramming TPIS chip

[romans@starstream.net (Romans, Mark)]

Any codes?
I have seen TPIS cut pin 28, which made it so that I couldn't read the chip.
Other than that I would do a file compare with a stock chip and look at all
the differences to see if they did anything else to the chip.  They also
changed
the mask to a different number and there is a match for the mask later in
the
chip and if that doesn't match either then weird things happen.  (This was
an
87 chip, mask 32 that I was working with)
Mark
----- Original Message -----
From: "Dan Plaskett" <dynastydan@worldnet.att.net>
To: <gmecm@diy-efi.org>
Sent: Saturday, September 02, 2000 10:22 AM
Subject: reprogramming TPIS chip


> Got a problem here that I remember someone batting around before.  I have
a
> couple of TPIS level 5 chips for 1986 Corvettes.  One uses the 32 mask the
> other 32b mask.  I used Tunercat to make a few mods and ran a checksum.
> After burning the new chip the checksum verifies.  Install and the car
> sounds like it is hunting and the SES light flashes quickly off and on.
> I've run into this before when I had a bad checksum, but that seems to be
> OK.  Any ideas.
>
> Dan Plaskett
>
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