bring it to a shop and have the codes read, you will have a stored fault
code telling you what it is.
I had an intermittent check engine light and it was one of my O2 sensors
"Rick" > wrote in message
...
>I recently acquired a 1990 325i with 191000 miles on it. It is in very good
>shape and has been cared for very well. It seems to run very good and looks
>very good. I have two questions
> 1. How do you change the air filter?
> 2. When I go downhill for long distances the engine light comes on but
> goes out when I accelerate. This only happens on long downhills at slow
> speed (30-40mph), never happens anywhere else, should I be worried?
> Thanks a proud owner of my first BMW
> Rick Burton
>