Converted my 93 7.5L gas to mass air flow with a HOG0 PCM, it's throwing a 553 code "Air management circuit 2 failure".

Where the heck is that? Or is the computer looking for something from a 5.0/5.8 that doesn't exist on my truck?

I've looked at the air management solenoid by the EGR valve, everything is connected and worked fine before the conversion.

Help ????

 

You must have missed a few wires when repinning the connection. The TAB, TAD and CANP connections are different between the 5.0 MAF computer and the 460 computer.

Heres a diagram:Ford Fuel Injection

 

Nope, I double checked those pins. I relocated them to the proper locations.

Does anyone know what component and where under the hood the "air management circuit 2" is? I would like to inspect it, but don't know what/where the heck it is.

 

It's your air diverter control solenoid or "TAD". Near the ignition coil on the right side.

 

Awesome, thanks!

 

I've been scouring the Internet looking for test procedures involving the TAB/TAD. I can't find anything for the EFI 460, it's all 4.9-5.8.

I want to test voltage on each solenoid and on the harnesses to determine if the problem is the solenoid or PCM.

???

 

They're all the same.