On the cannister to intake side, leaks are detected by deviations in the idle control system. Try backing up and hitting brakes, This will tigjhten them up. If the reed switch changes too quickly, a leak may be indicated. In order to properly check that car for a leak you have to either command the pump, or crimp the line to the pump. This one is tougher --- From underneath the vehicle just after the catalytic converter you should be able to see the Spark plug like O2 sensor.
They are a huge pain in the ass to change, have to lower the rear suspension to change them. The latter is a better choice. Symptoms: You likely won't notice any drivability problems. When the evaporative system begins to pressurize, the pressure on the bottom of the diaphragm will begin to oppose the spring pressure, slowing the pumping action. My first recommendation is to closely inspect all the small vacuum lines connected to the intake manifold. The longer it takes the reed switch to change state, the tighter the evaporative system is sealed. The engine enters closed loop operation after it reaches a specified temperature and the time delay ends.
This evap system has been on vehicles since the '70s. He checked underneath the car to the point where the wire disappeared --to confirm he had the correct wire. This O2 sensor had a short wire connector on the other end Probably can be replaced from the top. If there is a leak, such as a cracked vent hose, loose or leaky gas cap, poorly installed or defective O-rings on the fuel level senders on the fuel tank, etc. If you have leaks in the lines from the carbon cannister to the intake, intake leaks, a defective purge valve, etc you will often get purge flow faults. Once the fuel pump is removed, remove the filter retainer and filter.
You may be able to access the fuel tank by removing your bottom rear seat cushion. Also consider replacing the gas cap. It's very common on these cars for the leak detection pump not seal all the way causing a small evap leak. Fixed that as well -- have had no problems since -- repair was about 4 months ago. Also consider replacing the gas cap. Is number 7 and 15 hooked up right? Koyo the trusted brand is my suggestion though probably more expensive.
Smoke is coming out there because the pump isn't sealing all the way. The evaporative emission system is designed to prevent the escape of fuel vapors from the fuel system. You will need to retrieve the code s in order to know where to begin. The fuel tank is not vented, but rather the vapors are piped to the carbon cannister usually located behind the pass. This allows detection of leaks and blockage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.
The diaphragm is powered by engine vacuum. Challenge them with your receipts for a refund and further repair of the canister. The pumping cycle is repeated as the solenoid is turned on and off. The fuel tank is not vented, but rather the vapors are piped to the carbon cannister usually located behind the pass. This upward movement closes the vent valve. I fixed the first one only -- turned out the warning light lit up a day or so later indicating the second O2 Sensor under the vehicle was bad. To detect leaks, the system is pressurized by a pump so that leaks can be detected by a lack of appropriate pressure in the system.
On the cannister to intake side, leaks are detected by deviations in the idle control system. . Once you have the code you can begin a diagnostic check of the affected system. . Fuel vapors are routed by hoses to a charcoal canister for storage.
The sensors are located 1. If you have leaks in the lines from the carbon cannister to the intake, intake leaks, a defective purge valve, etc you will often get purge flow faults. Mazda ia a non interactive motor which means that if the belt breaks the car stalls and won't go anywhere. This evap system has been on vehicles since the '70s. The repair man told me Both usually go bad at the same time. I'm getting the engine code P0442, so far I've replaced the purge valve and the gas cap. If they are bad, there should be no charge for repair or replacement.