Running rich and bad Idle. Ecu code 12.

[HeadUp240]

I swapped my motor out of my coupe into my hatch. I daily drove it for 2 weeks fine until the brakes got really bad and starter quit. So I just decided to finish my CA swap. I finished it and I took the battery, fuel pump, and maf pigtail. I just recently decided to finish the hatch so I put in a battery, fuel pump and saudered in a new pigtail. I go to start it up and It runs really rich and idles rough. I checked the ecu and it throws code 12 which is the air flow sensor. I've tried three different mafs and a different ecu. Still no luck. The connection to the maf is good and is getting a signal. Any suggesstions? Wire the maf straight to the ECU? Thanks.

[Infinitiguy19]

Well it seems that either the MAF or ECU are the problem and since you replaced them that leaves the wiring. So I would look into that and wire it directly like you say.

but your sure that the MAF is good because chances are that will go before the ECU?