Purge valve on evap canister
09-18-2022, 07:50 AM
#1
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Car: Camaro rs 1991, BMW e39, F11
Engine: V6 3.1
Transmission: 5 speed manual
Axle/Gears: Stock
Purge valve on evap canister
Hy,
how is this valve supposed to work on top of evap canister?
Is there a membrane inside and should it hold vacuum just like any other vacuum actuator?
The thing is that it doesn hold it, its freeflowing and I'm not sure if membrane is torn or it should be like that....
I'm coming to the end of full rebuild and I have some backfiring....
Thank you
how is this valve supposed to work on top of evap canister?
Is there a membrane inside and should it hold vacuum just like any other vacuum actuator?
The thing is that it doesn hold it, its freeflowing and I'm not sure if membrane is torn or it should be like that....
I'm coming to the end of full rebuild and I have some backfiring....
Thank you
09-18-2022, 02:00 PM
#2
Senior Member
Re: Purge valve on evap canister
I cant tell you about the internal function of the valve, but whether it is working correctly or not will not cause your car to backfire.
09-19-2022, 10:30 AM
#3
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Car: check
Engine: check
Transmission: check
Re: Purge valve on evap canister
On the late V6 cars the purge solenoid is normally open (NO). So it won't hold vacuum unless activated.
The ECM closes it when purge isn't required. The ECM will then PWM it to purge the canister of fumes, at the right time.
RBob.
The ECM closes it when purge isn't required. The ECM will then PWM it to purge the canister of fumes, at the right time.
RBob.
09-22-2022, 05:39 AM
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Car: Camaro rs 1991, BMW e39, F11
Engine: V6 3.1
Transmission: 5 speed manual
Axle/Gears: Stock
Re: Purge valve on evap canister
Hy, sorry for late response. I had checked and its closed while engine running. Backfire was due to distributor being advanced.
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