Technician A says increasing the Reid vapor pressure (RVP)will help the engine start easier in cold weather. Technician B s ays increasing the RVP will increase the possibility of fuel boiling (vapor lock)in summer driving. Who is correct?

Question

Quizplus · Accepted Answer

Both technicians are correct. Increasing the Reid Vapor Pressure (RVP) of fuel does help in easier starting of engines in cold weather by ensuring the fuel vaporizes sufficiently. However, a higher RVP also increases the risk of fuel boiling or vapor lock during hot weather, which can lead to engine performance issues.

Technician a Says Increasing the Reid Vapor Pressure (RVP)will Help