Hello,

I just finished my 4AGE 20V BT swap and today i let the garage check the CO value of the car and the oxygen sensor value.
@ idle both values are okay, but @ 3000 RPM the CO is about 0.80 and should be beneath 0.5. The oxygen value was normal.

I still have a TPS error stored in the ECU. When i reset the ecu the code reappear directly. The CEL won't come on for it btw.

Could it be the tps causing this? Or what else can cause this? I assume when having a vacuum leak i wouldn't run rich, would i?

We might have the answer! I've measured the primary and secondary igintion coil resistance. The second one is perfect in the middle of where it should be, but the primary is 0.9 to 1.0 Ohm. It should be somewhere between 0.3x and 0.4x.

This could explain the running rich i think.