Bob, I get the same exact thing on my '87 4000CS. I was never sure what a normal reading should be. I hope someone can point out the answer. Also, what is normal pressure readings for the center BAR guage. I get something like 1.8 at idle and something like 4.8 while cruising at around 60-65. It sometimes goes over 5, is this normal? Anyone? Eric Sylvain sylvain@ctron.com