1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Black ash and idle problem!

Discussion in 'General Tech and Maintenance' started by DravenVX, Sep 23, 2005.

  1. DravenVX

    DravenVX Member

    Messages:
    64
    Likes Received:
    0
    Joined:
    Jul 5, 2005
    Okay i have 2 things to mention. When i go to wash my car it's always covered in this black ash crap or something, it comes from the exhaust! Now, is this normal or what cuz it's been bugging me since day one! The other problem i have is the car did idle fine and recently it started idling really low, like almost at the zero point. What causes this and is it bad or normal? I have a 92 vx hatch with a B16A swap with a chipped p28 ecu, AEM CAI, 2 1/4 inch piping for my exhaust, magnaflow cat and magnaflow muffler, stock header and stock everything else! What do u guys think is the problem?? :( thanks
     
  2. reikoshea

    reikoshea HS Troll...And Mod Moderator VIP

    Messages:
    12,633
    Likes Received:
    193
    Joined:
    Apr 27, 2005
    Location:
    San Antonio, TX
    black ash in the engine bay is usually caused by the wrong torque on the exhaust manifold bolts or by a bad gasket.

    the idle is probably a vacuum leak or the IACV is clogged.
     
  3. phyregod

    phyregod !!YTINASNI

    Messages:
    9,449
    Likes Received:
    225
    Joined:
    Jun 11, 2005
    Location:
    Central Texas


    Where is this "ash"

    If you get black on the rear of the car, your motor is running really rich. You should look into that.. Any check engine lights?

    A vacuume leak would cause the motor to idle high, not low. Could be the IACV.
     
  4. reikoshea

    reikoshea HS Troll...And Mod Moderator VIP

    Messages:
    12,633
    Likes Received:
    193
    Joined:
    Apr 27, 2005
    Location:
    San Antonio, TX
    just saying vacuum would make it irradic (sp)
     
  5. DravenVX

    DravenVX Member

    Messages:
    64
    Likes Received:
    0
    Joined:
    Jul 5, 2005
    yeah when i check the rear of my car, it's always dirty as hell from the black ash and i had a feeling that it was running a lil rich! I will change my ecu and see if it fixes the problem, thanks! As far as the idle problem i am not sure what it is or how to check it. What is the IACV, how do i check it? thanks again for ur replies everyone!
     
  6. reikoshea

    reikoshea HS Troll...And Mod Moderator VIP

    Messages:
    12,633
    Likes Received:
    193
    Joined:
    Apr 27, 2005
    Location:
    San Antonio, TX
    Idle Air Control Valve. Lil thingamajig on the back of your throttle body.
     
Verification:
Draft saved Draft deleted

Share This Page