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2000 Chevy Astro Misfire #1 cylinder

Tiny
DAVE RODER
  • MEMBER
  • 2000 CHEVROLET ASTRO
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 175,000 MILES
Check engine light has come on with codes p0300, p0301 and p1345. The following components have been changed plugs, wires cap, rotor. Camshaft sensor, ignition coil, ignition control module. Tests have been performed and the spark is present at idle, disappears at off idle and returns when approaching 1/2 to wid open throttle. When the camshaft sensor was replaced the learn process was performed. I still have the misfire problem. What am I missing.
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Saturday, April 18th, 2009 AT 3:28 PM

3 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
P1345 is saying CMp and CKP are not in sink problem maybe several things. Remove dist. Cap gently rotate rotor is there movement?
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Saturday, April 18th, 2009 AT 4:08 PM
Tiny
DAVE RODER
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  • 2 POSTS
There is slight movement rotationally but the distributor shaft also rises as it is turned
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Sunday, April 19th, 2009 AT 3:40 PM
Tiny
DOCFIXIT
  • MECHANIC
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There should be no movement GM says if movement replace dist. The movenent throws timing off and the code is set the other codes because of this. You may want to have it checked out but by all you have replaced there is not much left.
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Sunday, April 19th, 2009 AT 3:46 PM

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