Quick Answer. A bad mass air flow sensor in a vehicle makes starting difficult and affects the performance of the engine because he engine-control unit uses data from the MAF sensor to balance the fuel ratio the injectors deliver to the engine.
While porcelain tile boasts exceptional durability, there are few products and techniques you should take pains to avoid: 1  Never use a product containing ammonia or bleach (or any type of acid-based cleanser); these can alter the tile color and/or stain the grout. 2  Never use oil-based detergents or wax cleaners.
Choose a color-matched porcelain repair kit, which will match the color of the porcelain sink. Mix the repair compound with alkyd paint if you can not find a match. Test the alkyd paint by applying it to an inconspicuous area, then wipe it off with a clean, lint-free cloth.. Sand the hole with a medium-grit emery cloth to remove rust and uneven edges, until the area is smooth. Avoid sanding beyond the area of the hole. Wipe off any excess pieces of porcelain that are lingering inside or around the hole.