well I got my 00gsr back a couple of weeks ago from installing jdm itr pistons. My mechanic told me he raised the fuel pressure way up to insure I wasn't running lean. After a few days of driving I got a cel. I pulled the code and it looks like I am running rich. I am thinking that I cannot use my obd2 ecu anymore because of 11.4:1 compression, toda bs,etc. I called toda and they said they were pretty sure I could utilize my stock ecu with no problems.... What do you guys think? I really don't want to have to buy another ecu because I don't want to spend anymore cash on my car. Do you guys think I can tune this thing on a dyno without getting a CEL? Any help would be appreciated. oh by the way I have a sfc vtec, could I do fix it with that?

 

yeah need to dyno tune it and adjust your fuel pressure accordingly, im throwing the same code. just reset it the ecu. itll run fine

 

Too rich/too lean. I guess you could pull out the plugs and check the tips to be sure. If it's all okay, then an exhaust leak can cause a false reading from the O2 sensor.

I am currently getting the same code as well.