If I turn wipers off, rpm back normal with power on, and now my car wont start.

Maybe, I think the problem are there are in the deposit of fuel?..please help me

and how much does it cost to replace the battery, is it easy to take it to a mechanic?

vehicle stutter steps at various speeds, does fine when accelerating

How often are these estimated costs updated? I contacted 2 shops and am getting quotes almost double

cannot locate interior air filter