[jwinkler]

Thanks for all the suggestions - the reason I'm concerned is that this is a recent development. It used to not spike past 210 or so. The car does tend to sit for a while between outings (sometimes a couple of months - I know, I know, a pre-oiler's on my list). Could this contribute to this change in behavior? Would the fact that it sits for so long cause a problem with the thermostat?

Thanks again,

JLW