Just stacked the Quad with my EZ. truck ran for 1 day awesome. now i get the P0237 code. i have unplugged the Quad and ran just the EZ,no codes and truck ran fine. i have also unplugged the EZ and ran just the Quad, no codes and the truck ran fine. i have had the EZ for 5months with no problems. just got this code when trying to stack together. all connections seem to be okay. any ideas? thanks.

 

Make sure the MAP plugs are secure when they're stacked. Do you get excessive smoke when accelerating from a stop or during low throttle conditions while stacked and getting this code? If the truck is running ok and isn't smoking like it would if the MAP was unplugged then it's probably ok, just a gremlin. You could try cleaning the MAP and its contacts but I'm not sure if that would help.

 

I have the same stack and mine throws a P0236 and P0237? my truck tends to miss sometimes as well?