Code 45 after header install...super rich!

[Boston GN]

I'll keep it simple. I may know what the problem is already, but want to "double-check"

Swapped in a set if ATR headers along with some other stuff, like oil lines and crap. After I buttoned MOST of everything up, I wanted to start the car WITHOUT the IC in place so i could ceck for fluid leaks first. With the IC in place it would have been a PITA if I had to take it out again. Anyway, I have the MAF pipe going to the turbo sealed up but that was it, nothing going to the TB. Started the car right up, no problems...after a few minutes it threw a code 45 and basically died. Now, the O2 sensor is a fairly new Denso, so I'm almost positive it's not the problem.
Would not having the IC and pipes hooked up do anything?
If not then I suspect my MAF...BLMs were pegged at 90. I had a feeling it was on it's way out last year. Now I guess it's officially dead

Ugh

 

[wagon]

Well, with the MAF hooked up to the turbo, it was measuring the air going through the turbo, and not into the engine. The turbo was probably sucking alot more air through the MAF than the engine was actually using. So, the computer was adding in alot more fuel than the engine actually needs, since it doesn't know any better. Try hooking the MAF up to the throttle body instead. You probably won't get the light.

 

[Boston GN]

Ahh that makes complete sense. I have the IC almost in there, so once that's all hooked up, I'll start it up and see.
Thanks a bunch Wagon!!!!!!

 

[wagon]

Thanks a bunch Wagon!!!!!!

Yup.