96 ecu

[vtxrider]

have a 96 legacy gt (2.5) that after replacing head gaskets reset codes. After driving over 200 miles there is no code but there are 4 test monitors that are still running. To pass emissions here you can only have 2 that are still running. I talked with a mechanic friend and he told me that 96's have a problem with the software that it could take a 1000 miles or more to finish running tests. He said that 97 didn't have the problem. I was wondering if there was a software update or could I put in a newer ECU from a 97 or newer.

[Skruyd]

Considering that it is OBD2. I'm pretty sure there is a flash you can get for it, but you will still have to drive the car for so many miles and have so many key cycles. If you have the open port cable there is a vast amount of knowledge, roms and programs you can use at http://www.openecu.org

[vtxrider]

Found out that every time that you turn off the key it restarts the self tests. If I run the car a few miles on the freeway and don't shut it off and test it all the tests are finished running and no codes. If I shut it off and retest then the test monitors are blinking again. There is no update to fix this. I even tried an ECU from a 98. See Appendix D of this EPA document: http://www.epa.gov/OMS/regs/im/obd/r01015.pdf

[Legacy777]

Good find on that document.