2000 Chevy Silverado Computer not telling cylinder 2 to fir

Tiny
JTHUCK023
  • MEMBER
  • 2000 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 98,000 MILES
I recently changed all of my spark plugs. After doing so, my service engine light came on, so I used a computer diagnostic tool to try and figure out why. It said "random misfire cylinder 2". Thinking I may have had a bad spark plug cable or bad coil pack, I also changed those. The service engine light is still on, I used the diagnosis tool again and it is still saying random misfire on cylinder 2. I checked the spark plug and it seems fine, even bought a new set and exchanged them, the service engine light still comes on and the diagnostic tool still says the same. What could be going on?
Saturday, February 6th, 2010 AT 4:09 PM

2 Replies

Tiny
JTHUCK023
  • MEMBER
  • 2 POSTS
Just wanted to update that I checked the spark plugs again a minute ago and the plug for cylinder 2 was dusted with a blackish gunk. I cleaned it off (brass wire brush) to examine it and underneath the gunk it appears normal, no cracks, no odd smell, etc. I am unsure of what could cause this. None of my other spark plugs are dirty or anything. I am hoping it does not indicate a problem with the cylinder or engine itself.
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Saturday, February 6th, 2010 AT 4:35 PM
Tiny
SERVICE WRITER
  • MECHANIC
  • 9,123 POSTS
Did you clear the codes?

If not, do that and post back if it returns.
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Sunday, February 7th, 2010 AT 7:57 AM

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