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2000 Chevy Astro Misfire on cyl #4

Tiny
GPDADDYO1
  • MEMBER
  • 2000 CHEVROLET ASTRO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 209,870 MILES
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?
Tuesday, December 8th, 2009 AT 6:29 PM

5 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Sounds like PCM injector driver on no.4
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Tuesday, December 8th, 2009 AT 6:36 PM
Tiny
GPDADDYO1
  • MEMBER
  • 6 POSTS
Do I need to replace the pcm?
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Tuesday, December 8th, 2009 AT 11:11 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the light blue and black wire on no. 4 inj. Harness for open or short if okay replace the PCM
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Wednesday, December 9th, 2009 AT 2:10 AM
Tiny
GPDADDYO1
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  • 6 POSTS
Thanks for the answer, I'll let you know what I find out.
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Wednesday, December 9th, 2009 AT 7:14 AM
Tiny
GPDADDYO1
  • MEMBER
  • 6 POSTS
Thanks for the help, it ended up being a broken wire.
Luck for me it was close to the pcm.
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Monday, January 25th, 2010 AT 8:17 AM

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