Hi, new to this page and can’t find out anything on this issue. I have a 95 k3500 with a hx40 installed. It keeps throwing code 78 of the highway. My understanding is that this if from too much boost for too long basically. I DO NOT have a vaccume pump for it was removed. There was no longer a need for it with the hx40. The big question I am after is this, is there a way to bypass the solenoid so it will stop throwing the code and sending the truck into limp mode??? I am not really worried about the amount of boost that it produces on the highway I just need it to stop sending it into limp mode. Thanks.