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2000 Nissan Pathfinder one cylinder not firing

Tiny
FRANKNWORGU
  • MEMBER
  • 2000 NISSAN PATHFINDER
  • 3.5L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 199,000 MILES
Hi. I drive a 2000 model pathfinder. Computer indicates cylinder 6 not firing. They've changed the plugs,  coil and nozzle on this cylinder without improvement. The engine lacks compression and vibrates on idle running. What else could be the problem?
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Thursday, October 8th, 2015 AT 7:35 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,867 POSTS
Is the number six fuel injector getting power? Is the plug getting a good hot spark? What do you mean by lacking compression? Low compression will cause a misfire or a cylinder not to fire at all.
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Thursday, October 8th, 2015 AT 8:34 PM
Tiny
FRANKNWORGU
  • MEMBER
  • 2 POSTS
The engine shakes profusely when it starts. By lack of compression, I mean the engine has got no power. They have interchanged the plugs and yet the one cylinder is not firing. I asked the mechanic to grind the valves only but he is hell bent on changing the rings. In my opinion I do nor see why rings could be the cause. I taught rings can only cause smoking and soaking of plugs with oil. The plugs are not soaking yet.
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Monday, October 12th, 2015 AT 3:46 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,867 POSTS
Rings can cause low engine compression, which is what I am thinking at this point. If it has been checked, let me know the compression readings. NOTE: There are rings for compression and ones for oil. One can be bad without the other being an issue.
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Monday, October 12th, 2015 AT 5:09 PM

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