I have 2004 USDM FXT ecu... 2 in fact.. both have been ecutek'd... unfortuntely, I don't have the original fXT ecu, looking for an oem right now...
I'm changing some simple things like disabling some CEL codes... and also raising the rev limit...
I'm pretty sure i'm doing the changes properly... even raising the rev limit, I used the 1D address from the file posted by another user.. and the values make sense... I changed them to the STI limit, so nothing crazy..
however, whenever I make any change, be it CEL disable, or rev limit increase.... when I flash the new ecu, my CRUISE and CEL light are on, and when I start the car, the idle is really lumpy and surges...
I haven't driven the car yet...
Am I doing something wrong, or is there a ECUTek' checksum routine that prevents any changes to the ECU data ?
btw: the 2 ECUs were tuned by different tuners...
***EDIT***
Actually I tried to flash the 2nd ROM into the 1st ROM, and the same thing happened... so it seems like the flash itself isn't working properly... or I'm doing something wrong...
The SW seems to indicate the flash is ok however...