Materials to Maintain Your ZHP IIIII Hand Protection IIIII Tools to Maintain Your ZHP
Results 1 to 6 of 6
  1. #1

    Service Engine Soon - Random multiple misfires + running too lean

    The ZHP is whining; Random misfires, and some running too lean.

    Only recent service: put in refurbished/clean fuel injectors.

    Any idea? Quick google search tells me it’s vacuum leak problems:
    https://www.youtube.com/watch?v=QiqUAF0zxCk

    I forgot the exact code being thrown, but i’ll update that in due time.

  2. #2
    Join Date
    Jul 2018
    Location
    Campbell, CA
    Posts
    170
    Quote Originally Posted by Fried_Chicken View Post
    The ZHP is whining; Random misfires, and some running too lean.

    Only recent service: put in refurbished/clean fuel injectors.

    Any idea? Quick google search tells me it’s vacuum leak problems:
    https://www.youtube.com/watch?v=QiqUAF0zxCk

    I forgot the exact code being thrown, but i’ll update that in due time.
    Either o2 sensors (unlikely) or there is a vacuum leak, generally at the lower intake boot. Smoke test to confirm.

    Sent from my SM-G973U using Tapatalk

  3. #3
    Quote Originally Posted by ComradeNick View Post
    Either o2 sensors (unlikely) or there is a vacuum leak, generally at the lower intake boot. Smoke test to confirm.

    Sent from my SM-G973U using Tapatalk
    Will do!

  4. #4
    Looked, couldn't find any leaks... for some reason I checked my oil cap, and it was only threaded with one of the little ears.
    Put it on right, solved the problem!

  5. #5
    Join Date
    Apr 2011
    Location
    Fort Wayne, IN
    Posts
    980
    Quote Originally Posted by Fried_Chicken View Post
    Looked, couldn't find any leaks... for some reason I checked my oil cap, and it was only threaded with one of the little ears.
    Put it on right, solved the problem!
    If you are pulling that much vacuum in your crankcase you may want to look at replacing you CCV at some point. I saw a video the other day where the guy had to use a lot of force just to pull his cap off. If you pull the cap off and the engine looses RPMs or dies then it is time to replace the CCV. Couldn't hurt to check it out.
    2001 325i Sport Package / Rebuilt Motor at 194K / Lemforder M3 Motor Mounts / Thule Roof Rack / Eagle Eye Clear Tail Lights / Lemforder Sway Links
    BMW Performance Shift Knob / Alcantra Shift Boot / BBS Wheels / 15% Tint
    RIP - 2009 335i xDrive / Twin Turbo / Cold Weather Package / Premium Package / 15% Tint
    ER Chargepipe / Tial BOV / Dual Cone Intake / OEM Roof Rack

  6. #6
    Join Date
    Sep 2018
    Location
    Austin, Tx
    Posts
    295
    Quote Originally Posted by SureShot434 View Post
    If you are pulling that much vacuum in your crankcase you may want to look at replacing you CCV at some point. I saw a video the other day where the guy had to use a lot of force just to pull his cap off. If you pull the cap off and the engine looses RPMs or dies then it is time to replace the CCV. Couldn't hurt to check it out.
    A loose cap will cause lean mixture faults. BUT your description on checking vacuum on the cap with running is spot on for a quick CCVV check.
    Current Garage... '00 R11S, '09 HP2S, '12 R12GSA, '00 Black 323iT (wife's), '02 Alpine 325iT (Eileen, Track Wagon), '02 Japan Rot 325iT

    Instagram @ HillPerformanceBimmers
    Email to George@HillPerformance.com

Similar Threads

  1. Dinan e46 engine software and intake. Anyone running it?
    By Xcessive46 in forum General -- ZHP Related
    Replies: 12
    Last Post: 02-03-2018, 07:15 PM
  2. Engine rattle, SES light and rough running...
    By Zaks in forum Mechanical | Troubleshooting
    Replies: 3
    Last Post: 11-15-2017, 07:42 PM
  3. WTB: non running ZHP in need of an Engine/Trans
    By gfortner in forum ZHP-Related Parts & Accessories (no vehicle sales)
    Replies: 0
    Last Post: 05-13-2015, 07:16 AM
  4. Taxi Service Out of Business... Rental Car Service Up and Running!
    By dinanm3atl in forum Everything Non ZHP (the place for non-ZHP photos)
    Replies: 22
    Last Post: 11-18-2011, 08:47 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •