How to find a small EVAP leak without a smoke machine?
How to find a small EVAP leak without a smoke machine?
However, if you don’t have a smoke machine, you still have your thinking machine. Use your Critical Thinking to understand the system and find the leak. Loading…
What is the stopwatch on the Ford EVAP system?
Fig. 3 on page 22 shows a simple example of the integrity process. The CPS and CVS are both closed, sealing the gas vapor system. The FTPS shows −7.0 in.-H 2 O and the stopwatch represents the countdown timer inside the PCM.
How much pressure does an EVAP system have?
The system is designed to operate with very small pressure changes and is typically displayed in inches of water (in.-H 2 O). To put this into perspective, 1.0 psi = 28.0 in.-H 2 O, and 1.0 in.-Hg (inches of mercury) = 14.0 in.-H 2 O.
How are evaporative emissions systems used in cars?
Vehicle manufacturers use a variety of methods to reliably test evaporative emissions systems and identify increasingly smaller leaks. This is how Ford currently gets the job done. The evolution of evaporative emissions systems has been driven by changes in emissions standards.
However, if you don’t have a smoke machine, you still have your thinking machine. Use your Critical Thinking to understand the system and find the leak. Loading…
Fig. 3 on page 22 shows a simple example of the integrity process. The CPS and CVS are both closed, sealing the gas vapor system. The FTPS shows −7.0 in.-H 2 O and the stopwatch represents the countdown timer inside the PCM.
The system is designed to operate with very small pressure changes and is typically displayed in inches of water (in.-H 2 O). To put this into perspective, 1.0 psi = 28.0 in.-H 2 O, and 1.0 in.-Hg (inches of mercury) = 14.0 in.-H 2 O.
What are the enabling conditions for an EVAP test?
But before the test can begin, many enabling conditions must be met. In addition to the CPS, CVS and FTPS being fully operational, the mass airflow (MAF), intake air temperature (IAT), vehicle speed (VSS) and engine coolant temperature (ECT) sensors, plus a variety of engine management sensors, must be fault-free.
