After laughing, banging my head on the steering wheel, and then crying, I looked them up.

13 Oxygen sensor signal stays lean during warm engine cruise

42 Fault at electronic spark timing circuit OR Fault at direct ignition system OR Fault at fuel cutoff relay circuit

44 Oxygen sensor lean

I'm having the car hooked up to a scanner at the dealership tomorrow so they can moniter it while it's running so on and so on. Maybe they can come up with an idea or two, because I'm running out.

I need to go out and check the wires to the distributor at least.
o2 is a few weeks old
injectors are new
tps tested fine
maf worked fine before the swap, isn't setting off codes, and looks fine now anyways.
spark plugs are 2 weeks old
ecm temp sensor is new
no leaks in exhaust last time I checked
fuel pressure holds now after changing rail

My gas mileage is even worse so far this week. It did light up the tires (or tire) pretty good today though when I had to stomp on it to pull into traffic.

 

i still say the o2 isnt reaching prper operating temps.

 

If that's the case, then it baffles me as to how I'm the only person here with the cameric coated headers that has that problem. Unless I'm the only one with the 2.5 exhaust system also, and the lack of backpressure keeps it from heating up somehow, and I highly doubt that. I'm sure someone else has my same exhaust setup.

Hence the thread I made asking about that.

*Just read there someone else has that problem. I remember reading here somewhere that the cemaric coated headers shouldn't have that problem though.

 

Did you install a factory style O2 sensor, or the universal that you have to cut and connect wires?

The code 42 means that you hade the EST connector disconnected to set the timing or something.

Code 13 Means that there is an electrical fault in the O2 sensor circuit, wither it's open or shorted to ground/power somewhere. Most of the time it's a problem with an open in the wire.

 

That makes sense about the 42 I guess. I did adjust the timing recently to see if the rattle I have is spark knock. It's just the first time I've ever had that code in all the years I've been messing with this car.

I was told today the pin in the connector on the harness side of the 02 wire seemed like it was fitting loosely into the other half of the connector, and that I should try bending it slightly. I've ran into this before on generators. I'll give it a try.

I'm also going to install the soldered AC delco o2 tomorrow I think, and possibly get a heated o2 this weekend.