Hi first time posting a question.
I have a stock truck with a electric westec fuel guage. A isolater mounted ontop of a geno's metal cap with a 0-30 psi guage inside of the cab. As of yesterday the pressure would go from 15 to 10 while driving then after hitting a bump, going up or down hills or just driving a little ways it will return to normal cruising 14or 15 psi. It did this once today on the way home from work only to return to normal after maybe a mile. Do you think this could be the isolater, lift pump failing or a clogging pick-up tube? thanks a lot.
stock659