Question about Chevrolet Silverado 1500
Here is what I would recommend when trying to isoltate this condition. I understand that you already switched some stuff out and the misfire code is still present. I recommend pulling the plug and while leaving it connected to the wire and coil , place the electrode on the cylinder head or good ground source and have somebody turn the engine over while you visually verify that the plug is in fact creating a nice blue spark. The plug could be fuel fouled so have a new plug ready to try as well to make sure you are not mislead. If you have a good spark then I would start suspecting a leaking or possibly even stuck fuel injector for cylinder #2. Creating an overly ricj condition in that cylinder and causing a misfire. Diagnostically speaking you have taken the correct path so I think you got a good beat on it. Hope this was helpful.
Posted on Mar 19, 2011
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Posted on Jan 02, 2017
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P0305 is misfire in cylinder #5.
P0306 is misfire in cylinder#6.
P0316 is misfire on start up.
Have the plugs on those 2 cylinders, and the 2 fuel injectors checked, also check for spark from the coil on those 2 plug wires.
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