Help SupportFord Raptor Forum by donating:


Help support Ford Raptor Forum :

BOV stuck open?

Discussion in 'Ford Raptor Engine Discussion and Performance Mods' started by nikhsub1, Jun 26, 2018.

  1. nikhsub1

    nikhsub1 Full Access Member

    Posts:
    914
    Likes Received:
    436
    Joined:
    Mar 5, 2017
    So, today I pulled out of a parking lot and the truck would barely move when I pushed the gas - turbo gauge was showing almost max boost though. I thought I had blown an IC hose or something so I got to the right lane and as I was going to pull over the truck started working normally. This has never happened before but it was a bizarre sensation. The only thing I can think of, since now the truck is back to normal is that the BOV got stuck wide open for a minute? This has me thinking an aftermarket BOV maybe in my future.

    Thoughts?
     
    smurfslayer. likes this.
  2. downforce137

    downforce137 Full Access Member

    Posts:
    602
    Likes Received:
    308
    Joined:
    Jan 5, 2016
    Location:
    In Diana
    BOV open = No boost..
     
  3. zombiekiller

    zombiekiller FRF Addict

    Posts:
    1,205
    Likes Received:
    1,046
    Joined:
    Sep 24, 2017
    Location:
    New Orleans
    Ding ding. winner winner chicken dinner.

    If you had a loose hose or stuck BOV, no boost would register at all.

    The hose slipping off would also be loud as all hell and scare the crap out of you.

    Sounds more like an effed up torque converter
     
    Bhollier likes this.
  4. nikhsub1

    nikhsub1 Full Access Member

    Posts:
    914
    Likes Received:
    436
    Joined:
    Mar 5, 2017
    Great, even worse lol. Weird that it cleared up. My BOV vents to atmosphere and it was sounding pretty noisy while this was happening which is why I thought it could be stuck open. I did see boost registering on the digital gauge though, that I am certain.
     
  5. OPT PRIME

    OPT PRIME Full Access Member

    Posts:
    444
    Likes Received:
    238
    Joined:
    Jun 22, 2017
    When I first start up my truck I believe it leaves the exhaust valves slightly open to help heat the cats. There are extra flow noises during this process and the throttle is sluggish. At some point this all quits and everything is normal. My Miata does this as well.


    Sent from my iPhone using Tapatalk
     
    xrocket21 and Toadster like this.
  6. Toadster

    Toadster FRF Addict

    Age:
    49
    Posts:
    1,299
    Likes Received:
    566
    Joined:
    Jul 15, 2016
    Location:
    Folsom, CA


    Probably opens the BOV on startup to vent any moisture


    Sent from my iPhone using Tapatalk
     
    smurfslayer. and OPT PRIME like this.
  7. Higgs Boson

    Higgs Boson Full Access Member

    Posts:
    98
    Likes Received:
    53
    Joined:
    Apr 4, 2018
    Location:
    Texas Hill Country
    it is physically impossible to leave the exhaust valves slightly open.

    what you mean is spark lead is retarded to delay combustion to raise exhaust gas temps in order to preheat the cats coupled with retarding the exhaust cam to open and close the exhaust valves later (so the heat can escape to the exhaust system better from that retarded spark lead).

    at no time are any valves left slightly open, even in your Miata.
     
    OPT PRIME likes this.
  8. OPT PRIME

    OPT PRIME Full Access Member

    Posts:
    444
    Likes Received:
    238
    Joined:
    Jun 22, 2017

    Agree. Variable cam time just re-clocks the cam. They still close.


    Sent from my iPhone using Tapatalk
     
  9. Gargamel

    Gargamel Banned

    Age:
    34
    Posts:
    108
    Likes Received:
    14
    Joined:
    Oct 17, 2017
    Moisture??
     
  10. Toadster

    Toadster FRF Addict

    Age:
    49
    Posts:
    1,299
    Likes Received:
    566
    Joined:
    Jul 15, 2016
    Location:
    Folsom, CA
    in the intercooler from condensation after sitting
     
    smurfslayer. likes this.

Share This Page