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What EEPROM is better for a 1992 305 firebird?

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Old 08-10-2015, 01:38 PM
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Car: Pontiac Firebird 1992
Engine: 191 V6 3.1
Transmission: Automatic
What EEPROM is better for a 1992 305 firebird?

Hi everyone! I have a 1992 3.1 V6 Firebird and I am going to programming my PROM, one of my friends is using this:

Atmel AT29C256

http://www.ebay.es/itm/1PCS-IC-AT29C...item21004f6443

But I have read in this forum that the appropriate one for the 92 V6 191 is the 27C256:

http://www.ebay.es/itm/OTP-PROM-27C2...item53e2986565

I have the opportunity to get first ones cheaper than second ones.....
What would you do?

Thanks!!

Last edited by the_nikfive; 08-11-2015 at 02:47 AM.
Old 08-10-2015, 09:07 PM
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Re: What EEPROM is better for a 1992 305 firebird?

Originally Posted by the_nikfive
Hi everyone! I have a 1992 3.1 V6 Firebird and I am going to programming my PROM, one of my friends is using this:

Atmel AT29C256

http://www.ebay.es/itm/1PCS-IC-AT29C...item21004f6443

But I have read in this forum that the appropriate one for the 92 V6 305 is the 27C256:

http://www.ebay.es/itm/OTP-PROM-27C2...item53e2986565

I have the opportunity to get first ones cheaper than second ones.....
What would you do?

Thanks!!
The AT29C256 is a flash device. Many times programmable.

The AT27C256R is a OTP device. OTP being One Time Programmable. After that it gets tossed and another one programmed.

The '92 3.1l Firebird ECM does use the '256 kb PROMs. It is about 191 CI in displacement.

RBob.
Old 08-11-2015, 02:46 AM
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Car: Pontiac Firebird 1992
Engine: 191 V6 3.1
Transmission: Automatic
Re: What EEPROM is better for a 1992 305 firebird?

Originally Posted by RBob
The AT29C256 is a flash device. Many times programmable.

The AT27C256R is a OTP device. OTP being One Time Programmable. After that it gets tossed and another one programmed.

The '92 3.1l Firebird ECM does use the '256 kb PROMs. It is about 191 CI in displacement.

RBob.
Thank you so much Rbob, then I'm going to buy first ones!


Thanks!
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