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Thread: Evap vent functioning?

  1. #1
    Senior Member
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    Evap vent functioning?

    Has anyone here using the crate motor/trans/ford control pack ran their fuel tank vent all the way up and use the Evap emission control system as designed? The valve is in place in the motor/trans control pack kit. I am wondering if it is still functioning in the ecu or has been cleaned out with other obd-2 functions. It would be nice to be able to truly vent the fuel tank (maybe using a 2015+mustang carbon canister) and completely alleviate gas fumes and make ethanol spiked gas safer to run.
    '33 Hot Rod
    Ordered: 3/25/17. Delivered: 5/6/17. 1st start: 8/24/18

    MK4 Roadster
    Ordered: 7/10/13. Delivered: 8/20/13. Completed: 10/26/15.
    I did everything except spray it. She ain't perfect, but she's mine.

  2. #2
    Senior Member Dave Howard's Avatar
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    Its been half a dozen years since installing my Coyote in the MkIV, but I tend to remember I physically removed the valve and blocked the port. Did not use and it had no impact or bearing on how the engine ran.

  3. #3
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    The evap purge solenoid on the throttle body is wired. It seems easy to wire the canister vent solenoid.

    As for function, only a tuner can tell and set what the control pack is actually doing with these controls. From what I can tell, all obd2 functions are still in the control pack. There are just enabled/diasbled.

  4. #4
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    Talked w/ Steve from Ford Performance Tech line this morning and he said the crate engine PCM has the Evap Emission Purge valve disabled. A tuner can go in and turn it on. I think on my engine I'm going to just plug it and install a charcoal canister vented to atmosphere.
    MK4 #9237 - complete kit, Coyote, TKO600, IRS - Delivered 12/11/17

  5. #5
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    Thanks, mr Jim. I’m going to use a charcoal canister but I think I’m going to have the tuner turn that on eventually and tube it up.
    '33 Hot Rod
    Ordered: 3/25/17. Delivered: 5/6/17. 1st start: 8/24/18

    MK4 Roadster
    Ordered: 7/10/13. Delivered: 8/20/13. Completed: 10/26/15.
    I did everything except spray it. She ain't perfect, but she's mine.

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