View Single Post
Old 07-16-2010, 10:40 PM   #15 (permalink)
saand
Wiki Writer
 
Join Date: Jul 2010
Location: Melbourne, Australia
Posts: 236

bugler - '91 Mazda 626
90 day: 35.89 mpg (US)
Thanks: 15
Thanked 25 Times in 22 Posts
Thanks
I may have a problem with my specific car though,
I opened up the ECU yesterday and found no eeprom at least i cant identify an eeprom on the board.
I attached a picture of the ECU PCB (it is only single sided)
for reference this is an ECU from a mazda 626 91 year
the ECU details on the box, Delco, F2H2

I searched for datasheets for all of the chips and the only memory chip i could find is on IC605 which is a ram chip so it cant hold the data after power down so this cant be it.
the IC601 appears to be the processor however i cant find any data on it, i assume its a custom IC.

So even if i can get the tuning program it may not be useful

captin if you have tuned cars previously can you identify any eeprom in this ECU, if not have any idea if there is a programming connection for the ECU. I figure i am not going to have much luck due to the age of the ECU and the limited information around.

For others following the thread hoping to tune your own ECU i also found a free tuner which looks fairly good, doesn't support all cars though
TunerPro and TunerPro RT - Professional Automobile Tuning Software
A website i found with tutorial on chip tunning
ECCS • View topic - A long tutorial for tuning nissan's ECUs

as captin said previously from what i have found it loks fairly easy to tune your own ECU as long as your ECU has an eeprom or a programming connection, Newer ECU's can probably update values over the ODB2 connection
And a eeprom burner or programming cable

For my car, if i cant find an eeprom on the board or identiy a programming connection looks like i will be forced to adjust inputs and outputs on the ECU to fool it into working the way i want.
Attached Thumbnails
Click image for larger version

Name:	ECUPCB.JPG
Views:	98
Size:	89.8 KB
ID:	6372  
  Reply With Quote