the_mork
15+ Year Contributor
- 2,619
- 26
- Mar 10, 2008
-
Eau Claire,
Wisconsin
right now i am not to concerned because i found the periphary bit to turn that check off on the 9055 rom, for some reason i cant get it to work with the 9653 rom. besides if it were the fuse i should be having problems with other things as well.
The periphery bit only handles the rear o2 signal. The 9055 rom must not have a check for rear o2 heater which I believe is your issue.
I also received a PM from a member who doesn't have enough posts to post here so I told him I would post.
Hubbard 0 said:Since I can't post in this thread yet, even though I've been running an Evo ECU since before christmas, I thought I would help you guys on this O2 sensor thing. When you get check engine lights for silly things like that, you can just turn them off in the ECU and never worry again. I had one that had to do with fuel temperature and was able to just flip it off. Hopefully this helps you guys out a bit.
I'll post your reply but the problem here is that no one has found the bit that controls the secondary o2 heater circuit malfunction. We can control a CEL for the lack of information from the o2 sensor by disabling it in the address FAA but the heater code is the issue and must be handled through actual hardware manipulation.
I did note that there is now a software patch in testing for handling the rear o2 heater on 9s but so far I haven't seen anything for 8s
If anyone isn't sure what is going on here we are discussing adding this line to the metadata for any evo8/9 rom. If you were to copy it directly from here you would need to remove the space from between the < and the word table because this forum is not set up to handle this sort of line as regular text.
< table name="(periphery 0)" category="Misc" address="faa" type="1D" level="1" scaling="Hex16"/>
Then changing the value of that rom to any of these values.
56D0 -No rear O2 no Immobilizer
5650-no rear O2, No immobilizer, No knock
5658-no rear O2, No knock sensor
56D8-no rear O2
5698, no front or rear 02
5690, no front 02, rear 02, or immobilizer
56D2, No immobilizer

We need to get a restricter in the BCS line so we can get more than the 20-20.5 psi that we're at. I'm definitely goona be working on the ECU boost control when I get to tuning my 2g with the Evo ECU; I'm hoping I can somehow use that to hold the boost a little higher on top end and maybe keep the boost down slightly on the low end to keep the drivetrain together.