I know this is probally a dumb question, but today my fuel pressure gauge says i only have 30psi. Wouldnt the check engine light come on and the truck would not even run on that I am assuming. My wide band says that I am running 14.5 cruzing, and 12.0 wot. I know the 12 is high I am am waiting on my retune from Allen. I am sure the sending unit is bad on the gauge.