@Valkyrie guessing...yes. Have i pulled codes? well..have tried many times, watching many videos and I do not get codes. Or my bulb never blinks, i should say. Else, i upload a video so you guys can confirm to me the code i believe it is.
I will try and source an S8 OMP but I really am leaning towards delete, as I premix anyhow. About 250 ml per tank but can double that to compensate. So maybe will move to Microtech but I only have about 110k on the car, so it is fairly low in USA standards for the age.

 

You sure its a stock ecu?

 

If the OMP is causing limp mode, there will 100% be a code or two thrown.

Like I said, unplug something like the oxygen sensor to make it throw a code to see that you are actually reading the codes correctly.

 

I am letting this thread go hah. I can't pull the codes...or I am seriously not going about it correctly. The past few weeks, it has been starting and driving properly as it previously always had. I am not sure.

The only new issue and unrelated is it always blows hot air out of the defrost vent, even when selector is on face. You can hear it switch modes i.e. defrost, feet, vents and i can hear it switch from hot to cold. No leaks...so I assume the heater core is okay (as in not leaking) but maybe it is clogged? Maybe just a faulty actuator. If i could get it to be "stuck" on vent/aircon then that would be awesome. lol

thanks to all who have assisted me

 

Sometimes people will put an aftermarket ecu in a OEM ecu case.......................

 

It is difficult to get in under the dash to look at your HVAC units. Why not buy in something like this (seamail maybe US$60) and study it. You can use it for spare parts later.

To get at the heater units, other than the A/C section, you have to remove the dash, which may cause lots of other problems.

https://buyee.jp/item/jdirectitems/a...n_DirectSearch