Greg,
I agree, there is an issue causing the car to run rich. I have a feeling that the catch can has contributed to this by pulling oil into the engine, then pushing it out the exhaust and into the sensor.
When we pulled the exhaust, I was actually looking for any signs of leaks. Eric has done a nice job of sealing it all up though: I saw no signs of carbon at any of the joints or welds.
It will be relatively easy for me to check continuity between the ECU and the O2 sensor connector with everything pulled apart, and I was already planning to do that. I found the pinout and wiring information from Holley, so I will use a meter to confirm the wires are all in the correct positions. The Holley HP EFI software will tell me if it thinks there is a problem with the sensor, and it was not reporting one. That doesn't mean that there isn't though. It can be working, but be 'off' as this one is acting...
I'll find the problem. And also, before I spend much time driving the car after this build, I will get it back on a dyno with a second O2 sensor again to make sure mine is reporting correctly! I definitely do NOT want to do this again!!!
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