Low fuel pump pressure causes a _____ mixture and excessive pressure causes a _____ mixture.

Gasoline in a fuel tank has been contaminated with water from condensation. Tech a says it will stay on the surface of the fuel and can be skimmed (removed) off. Tech b says that it will dissolve in the gasoline and be burned during the combustion process. Who is correct?

An O-ring at the base of a fuel injector ______.   provides thermal insulation to allow the formation of vapor bubbles   increases potentially damaging vibrations   dampens vibrations and seals the injector of vacuum leaks   seals the injector to its upper mounting position

Q156. which of the following components can cause execcively high pressure in a returnless fuel delivery system? a. faulty fuel pressure. b. faulty fuel pressure regulator c. all answers are correct d. faulty PCM