Has there ever been a modified OEM looking EEPROM?

[Rexxenexx]

Has there ever been a modified OEM looking EEPROM?

I had a small box for all my Typhoon stuff in the 90's with an OEM looking EEPROM and a piggyback (Superchips/March/APE I can't remember) module. The box was stolen while I went to college so that's all gone. The Typhoon was modified by a performance shop back then and, according to the dash, keeps thinking it's overboosting (analog autometer says @10PSI, OEM dash gauge swings off the scale) even after completely returning stock.
Here's a TunerPro snip of the spike.

 

[luisdial1]

Turbo tweak chip?

 

[Sy2622]

Have you checked your map sensor and associated wires to ensure they are reading correctly 1bar, 2bar,3 bar? Which do you have on it?

 

[Isthatthingstock99]

Has there ever been a modified OEM looking EEPROM?

I had a small box for all my Typhoon stuff in the 90's with an OEM looking EEPROM and a piggyback (Superchips/March/APE I can't remember) module. The box was stolen while I went to college so that's all gone. The Typhoon was modified by a performance shop back then and, according to the dash, keeps thinking it's overboosting (analog autometer says @10PSI, OEM dash gauge swings off the scale) even after completely returning stock.
Here's a TunerPro snip of the spike.
View attachment 1865690

Back in 2012? 2013? Michael Hood (AKA @sytyguy) posted about different iterations of Stock ECU chips. (If you have a 92/93 typhoon) the EEPROM would have the imprinted text BBZA or BBZB identifier on it. If I remember correctly, you should still be able to flash the EEPROM to improve/add revisions of the BBZB or BBZA chip if you so choose. An example would be if you had a Syclone AYBM EEPROM, you could flash it with the BBZB bin. If you can clarify that the chip has either Identifier (BBZB/BBZA), you should be able to determine whether or not its a true stock chip or not. The next part would be determining what modifications have been made to it after the fact. Hopefully this clarifies a little bit more.

Also here is a link to the post @sytyguy made http://www.sytyforums.com/threads/syty-eprom-differences.102130/