[ron skeen]

When you check the tire temps make sure you do at the same spot on each tire, also remember if a tire is in the sun the temp could be hotter which would give you a higher air pressure, remember Boyle's law.

That said I need to buy a new tire monitor system. I left the old one on the '93 since its 4 years old and I've had a few problems lately. Any recommendations?

Pressure Pro, I have used for the last 10 yrs and I total have faith in the reading. I never check air or temp unless the P/P give me a low air warning. I do check the air pressure with the P/P gauge before I start on the road after every overnight stop.