Can anyone tell me if the ox sensor will go crazy if I do a head swap (360 for stock) and pro-flo 2 / M1 or Edelbrock FI intake manifold replacement on my 318 magnum? If so, what can be done about that?

Dodge Dakota 5.2 magnum 1996

 

My understanding is that the 5.9 heads are the same as the 5.2. As for the other stuff, when you disconnect your battery while you're working on the intake stuff, it will reset the PCM and it will relearn the sensor & flow settings. I think it would probably be advisable to replace the O2 sensors at the same time, but other than that the PCM should have no problems.

 

The PCM can make up for some improvements you make. I installed a 5.9 and continued to use the 5.2 PCM. It ran okay and seemed to have a lean misfire at idle. When I looked at the fuel trims I could see that they were pegged lean, the computer was dumping fuel to make up the difference but it wasn't enough. I increased the fuel pressure and the fuel trims leveled out back to close to zero. I doubt installing the M1 manifold will make any difference but a better flowing head or larger valves might. You can read here https://dodgeforum.com/forum/1st-gen...-360-swap.html what I did to fix my lean problem.

 

awesome - thanks guys, then I'll make this happen early next year