CODE P0301

  • Tiny
  • BAMF23
  • 2005 Chevrolet Tahoe
  • 78,000 miles

I changed my plugs, wires, and coil pack on cylinder 1 but it still idles rough and at about 500-700 rpm. Where is cylinder 1 located. I want to be sure I changed the right ignition coil and should I get the injectors cleaned too, so the idle goes back to normal?

Do you
have the same problem?
Sunday, September 11th, 2011 AT 4:46 PM

1 Reply

  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,409 posts

Yes, a PO301 is indicating a misfire in cylinder 1. You are correct. As far as the idle, cleaning the injectors COULD help, but there are a few things that could cause it. Check to make sure there are no vacuum leaks. Also, make sure the injector itself is working properly. I say that because I don't know how bad the misfire is.

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Sunday, September 11th, 2011 AT 4:49 PM

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