I recently ran my truck without a boost module, just a VA timing box and DDIII's. No check engine light and definatly no defueling. It ran up to 33psi and stayed there, just like it normally does. Reason I did it is because I get a check engine light that relates to the MAP sensor. It doesn't come on without a module. When it happens,there seems to be a slight hesitation util boost is built, anyone know what that could be? Runs great without a module.
The truck is a 98. 5
Nate
The truck is a 98. 5
Nate