2000 Chevy Astro Misfire on cyl #4

2000 CHEVROLET ASTRO
209,870 MILES • 6 CYL • 2WD • AUTOMATIC
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GPDADDYO1
  • MEMBER
  • 6 POSTS
Change motor, dist, cap, rotor, wires, plugs, still misfires on cyl 4, checked harness with noid light, no power to #4 injector. The only code is a misfire on #4 cyl....Code 304
What are the possible causes, and could it be the pcm?
Dec 8, 2009 at 10:29 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Sounds like PCM injector driver on no.4
Dec 8, 2009 at 10:36 AM
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GPDADDYO1
  • MEMBER
  • 6 POSTS
Do I need to replace the pcm?
Dec 8, 2009 at 3:11 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Check the light blue and black wire on no. 4 inj. harness for open or short if okay replace the PCM
Dec 8, 2009 at 6:10 PM
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GPDADDYO1
  • MEMBER
  • 6 POSTS
Thanks for the answer, I'll let you know what I find out....
Dec 8, 2009 at 11:14 PM
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GPDADDYO1
  • MEMBER
  • 6 POSTS
Thanks for the help, it ended up being a broken wire.
Luck for me it was close to the pcm.
Jan 25, 2010 at 12:17 AM
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