360 - Fuel test port schrader valve too short - not engaging ? | FerrariChat
Buy

360 Fuel test port schrader valve too short - not engaging ?

Discussion in '360/430' started by fotostars, May 3, 2020.

This site may earn a commission from merchant affiliate links, including eBay, Amazon, Skimlinks, and others.

  1. fotostars

    fotostars Formula Junior

    Feb 6, 2015
    345
    Bay Area
    #1 fotostars, May 3, 2020
    Is this just me? I just wanted to use my standard fuel gauge to check on the health of my fuel pumps.
    I released the pressure on the rail with a screw driver pushing on the valve. Letting fuel out in a rag.
    Then screw in my trusted fuel pressure gauge. Start the car. -> no reading.

    Puzzled :( maybe my gauge is faulty. Go to my Spec Miata test port. Release pressure with a screw driver. Screw the gauge, start the engine and it reads the expected 36psi.

    The only explanation I have is that the core is more recessed on the 360 and the pin on my gauge adaptor is not long enough to push on the valve to open it. It’s actually pretty obvious comparing both.

    Any thoughts or experience here? Short of taking the core out and make more of a mess when taking it out and disconnecting the gauge after pressure is back.

    The 360:

    Image Unavailable, Please Login

    What I have on the Miata:

    Image Unavailable, Please Login


    Sent from my iPhone using FerrariChat
     
  2. 24000rpm

    24000rpm F1 Rookie

    Aug 31, 2012
    4,650
    China and California
    #2 24000rpm, May 3, 2020
    change the pressure tester. mine works just fine
     
  3. hessank

    hessank Formula 3
    Silver Subscribed

    Aug 8, 2005
    1,867
    Canada, Florida
    Full Name:
    Fred
    #3 hessank, May 4, 2020
    My Tester works great too. Never a problem.
    As a matter of fact I carry it around for emerg testing on long trips just in case.
     
  4. EastMemphis

    EastMemphis Formula 3
    Owner Silver Subscribed

    May 25, 2019
    1,822
    Memphis, TN
    Full Name:
    John
    #4 EastMemphis, May 4, 2020
    The easy answer would be to grind down the tip of your tester so it has a shorter reach. The other option would be to make or buy an extension, like they have on big rig trucks. You can buy them for a few bucks at any auto parts store.
     
  5. fotostars

    fotostars Formula Junior

    Feb 6, 2015
    345
    Bay Area
    #5 fotostars, May 4, 2020
    What brand/model works for you guys?


    Sent from my iPhone using FerrariChat
     
  6. fotostars

    fotostars Formula Junior

    Feb 6, 2015
    345
    Bay Area
    #6 fotostars, May 4, 2020
    I think my problem is the opposite. The tip of the tester appears to be too short.


    Sent from my iPhone using FerrariChat
     
  7. fotostars

    fotostars Formula Junior

    Feb 6, 2015
    345
    Bay Area
    #7 fotostars, May 4, 2020
    Ok. Just to close on this. The O’Reilly “loan-a-tool” worked well.
    Measured 50psi at Idle, 40psi after 1h30 rest. Both banks the same.
    Well within specs according to WSM.


    Sent from my iPhone using FerrariChat
     
    Anthony 360 F1 likes this.
  8. fatbillybob

    fatbillybob Two Time F1 World Champ
    Consultant Owner

    Aug 10, 2002
    28,557
    socal
    #8 fatbillybob, May 5, 2020
    Buy new shrader valve core high quality for fuel. Go ask parts guy at Napa autoparts. Unscrew with valve core tool replace new at right level just finger snug to hold seat. If you don't know what that feels like have a pro do that. Now your gauge should work fine
     

Share This Page