87 ECU tuning
Intermediate
Joined: Jan 2010
Posts: 47
Likes: 10
From: Dania Beach, Florida
87 ECU tuning
I've done it. Takes a lot of time and most of the sites with information are dead now. Here is a quick over view.
First you need to remove the Memcal (EEprom and repetitive network) It's in the ECM. You need to read the binary information stored in the EEPROM chip. To do this you need a EEPROM programmer, I use MiniPRO TL866CS. (to read the Memcal you will need a Memcal readout Header). Once you get the binary file you need to get a dis-assembled file, which gives the address of where to program information is for O2 sensor is. ( I'm not sure you can remove the O2 sensor information).
You use a Hex editor to modify the values of you ECM image, load the hex file in the programmer and then modify your EEPROM information on the chip.
There is a guy on Ebay that will do it for you and is pretty smart here is his URL: https://www.ebay.com/itm/GM-TPI-Tune...Sitd:rk:2:pf:0
Ray
First you need to remove the Memcal (EEprom and repetitive network) It's in the ECM. You need to read the binary information stored in the EEPROM chip. To do this you need a EEPROM programmer, I use MiniPRO TL866CS. (to read the Memcal you will need a Memcal readout Header). Once you get the binary file you need to get a dis-assembled file, which gives the address of where to program information is for O2 sensor is. ( I'm not sure you can remove the O2 sensor information).
You use a Hex editor to modify the values of you ECM image, load the hex file in the programmer and then modify your EEPROM information on the chip.
There is a guy on Ebay that will do it for you and is pretty smart here is his URL: https://www.ebay.com/itm/GM-TPI-Tune...Sitd:rk:2:pf:0
Ray
Team Owner
Joined: Jul 2004
Posts: 28,353
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From: Hartford WI
