Genuine Mazda MX-5 Miata Vapor Canister

Mazda MX-5 Miata Vapor Canister Parts and Q&A

• Vapor Canister
  PXFV-13-970
  Q:

  What is the purpose and function of the Evaporative Emission Control (EVAP) system,Canister Purge Valve and Vapor Canister on Mazda MX-5 Miata?

  A:

  The design of Evaporative Emission Control (EVAP) system is such that it can be used to catch and store the vapors from the fuel tank, throttle body and intake manifold to prevent hydrocarbon (Hc) emissions from escaping. There is a canister packed with charcoal, connector lines, a check valve, a rollover valve (in some models), and a purge solenoid. When the engine is off, vapor is transferred to the canister, and, when the conditions are right, a PCM-controlled purge solenoid valve opens to allow intake manifold vacuum to pull the vapors into the manifold for burning. In models from 1997 and before, both the EVAP canister and the canister purge valve are located in the engine compartment, while in models from 1999 and after, the purge valve is in the engine compartment and the canister is under the vehicle, near the fuel tank. For the canister purge valve replacement 1997 and earlier, first disconnect the electrical connector and vacuum hoses. Next, unbolt the valve from the bracket. Installation is the opposite of removal procedure. As labeled and disconnected the upper vacuum hoses from the EVAP canister, detached the canister from the bracket, and removed the lower vacuum hose with installation in the reverse order of removal. The procedure for 1999 and later models begins with the same steps. First, detach the electrical connector and vacuum hoses. Next, remove the mounting bracket bolt. Finally, installation is the reverse of removal. In order to access the EVAP canister, secure the vehicle on jack stands and remove the small cross brace under the canister. Then disconnect the EVAP line quick-connect fittings and loosen the hose clamp on the 3rd line. The canister, along with its mounting bracket, is removed as a single assembly, and the canister is separated from the bracket. Installation is in reverse order.