I was wondering what is the problem, the solenoid or the valve, vaccum lines or what? The light does not come on all the time but I would like for it not to come on at all. I can not tell the car runs any different. Where is the solenoid and how do you know if it is bad? I did a search but did not really find a answer. The car is a 1990 completly stock. Thanks for the help.