I installed a used autometer boost gauge today out of an old truck of mine. It worked fine in my other truck. I have it tapped into the manifold elbow run to the a pillar. with the truck off it reads 5lbs with the truck running it continues to read 5 lbs untill I get enough boost then it rises and falls correctly with the SCT livewire reading. untill it falls below 5 then it stays on 5lbs. Im pretty sure its not a pintched line because it had this reading when I had it out of the truck, I just thought it would work once everything was plumbed and the truck was started. Any Ideas? Thanks