CODE P0301

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?
September 11, 2011.

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.