I would like to answer that but I don't know what a "moniford" is.
would like to know where the speedometer sensors are on a 1999 villager
You can't fix it till you know what's wrong with it.
That's hard to answer, since I don't know what a "calistar" is.
we need to know what year, model, and which 3.0 you have, there were more than one.
It will not idle at the proper speed (750 RPM).
i asked the question how would i know the answer
When repairing a car, it is important to know the cost of the repair. A 1996 Mercury Villager it would cost between $20 and $60+ depending on part brand, shipping costs or labor costs.
To let the PCM know that the engine is warm enough for closed loop mode.
If it gets faster and louder when you rev the engine it might be a lifter in your valve train. Not hearing it i don't totally know.
This is not a DIY job. You have neither the expertise nor the equipment. Take it to a pro.
It only takes about 15-20 minutes if you know what you're doing.