|
Could be a vacuum leak, or a clogged line. Clogged line would restrict flow so the response might not be as quick as the other one.
When you pry it out clean it thoroughly inside. Brake cleaner comes to mind. Of course clean it when it's disconnected from the car.
Then replace the two rubber ends with fresh ones. Not sure if the gauge has any corresponding values to it, to me it seems more of a qualitative gauge indicative of whether you're getting good or bad MPG. As long as it holds vacuum I would think you're fine.
|