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What is PO300 in a 3.0 V6 sidi Holden Omega

Tiny
BRUCEY 78
  • MEMBER
  • 2010 HOLDEN
  • 1,700 MILES
Number 1, 3, 5 is working but not 2, 4, 6 not firing
Monday, January 23rd, 2012 AT 2:26 PM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
P0300-Random misfires is normally caused by vacuum leak and bad fuel

No references on this vehicle but check if it has a crankshaft positioning sensor-if so check and test it-

Also go to this link for more information: Engine Runs Rough or Misfires
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Monday, January 23rd, 2012 AT 2:36 PM
Tiny
BRUCEY 78
  • MEMBER
  • 4 POSTS
But y cylinders 2, 4, 6 not firing?
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Monday, January 23rd, 2012 AT 2:47 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be injectors are not firing on that side, or the CPS not telling the computer to fire the coils for those cylinders and ignition control module/vacuum leak

Also refer to this link: https://www.2carpros.com/articles/engine-misfires-or-runs-rough
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Monday, January 23rd, 2012 AT 9:32 PM

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