Question about 2000 Toyota Corolla
Posted by Anonymous on
The common valve for failing on these vehicles is located under the car in the back, directly behind the rear axle. it comes as one unit with the charcoal canister and all the connectors, i believe runs in around the $300 range, and is available only at Toyota dealers. it is held on by 3 bolts that go straight up into the floor, and is fairly simple to change with a few basic tools. please take care when disconnecting the tube and electrical connectors, damaging these will make this job quite a bit more complex.
FYI i had to order one of these parts a few weeks back, in my area the part was actually back ordered about 4 weeks, so make sure you get your hands on one before taking it apart! good luck!
Posted on Jul 07, 2010
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Posted on Jan 02, 2017
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The purge solenoid valvend canister are part of the EVAP system. The automatic diagnostic method tests the integrity of the EVAP system for leaks by pressurizing everything and then checking to see if pressure is lost. The filler cap is the main seal to the gas tank and if this is loose then compromises the ability of the system to be pressurized. Put a film of grease around the rubber seal and fit the cap tightly.
The following is a brief overview of the system (any spelling anomalies are due to my British background). I hope you find it helpful :-
What is it? The EVAP system is a collection of pipes and devices designed to prevent
fuel vapour emission to protect the environment.
Where is it located? Pipes run from the top
of the fuel tank to the carbon (vapour trap) canister which can be located
between the inner and outer fenders (wings), on the inner fender or on the
firewall (bulkhead). A pipe connects
the canister to the throttle: the pipe exits just in front of the throttle
How does it work? The EVAP system passively stores the vapour from the fuel tank in a
charcoal filled canister. When the
engine is running above idle speed the ECU opens a purge valve to the pipe
leading to the throttle body. A vent
valve allows the ingress of air into the canister and this encourages fuel
vapour to be drawn out through the purge valve to be added to the air intake
mixture to be burnt. The opening of the
purge valve cycles with engine speed.
The purge valve should be closed during idle.
Symptoms of faulty EVAP
How to check? Simply clamping off the pipe from the EVAP purge valve should result in
an immediate improvement in engine idling performance. Remove the purge valve and try to blow
through it. If there is resistance then
the valve is mechanically OK. Applying
voltage to the electrical connections should open the valve and remove any
resistance to blowing.
How to fix? If the valve is jammed open permanently or fails to open when signaled to do so then replace it. It may be possible, taking the greatest of care in the process, to open the valve to clean it up in the hopes of affecting a repair. If the solenoid itself, however, shows 'open-circuit' due to an electrical break it is best to replace it.
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