Have you tried unplugging the neg battery cable for 30 mins to re set the
computer?

Carl

> wrote in message
oups.com...
>> IS there a layer of brownish red scum (or any other color) in the
>> expansion
>> tank?
>
> No, but there was back when I bought the car. I flushed the coolant
> using one of those garden-hose adapter things, and cleaned the overflow
> tank about two years ago. I wouldn't eat off of it or anything now, but
> it's reasonably clean.
>