I've got a 2007 tahoe and it was throwing up a few misfire codes...P0300, p0308, and p0307. I replaced 7 of the spark plugs the other day and it ran perfectly for like 50 miles. Next day I go and replace #8 (which is the hardest one) and the misfire is back. Replaced wires and quadruple checked to make sure the plug and wire is tight. Swapped the coil with another and still get p0308 and am now getting p0004 intermittent.
Help! Does this mean I've got an injector issue? What else should I check?
Help! Does this mean I've got an injector issue? What else should I check?
