John Reding

Hi Guys, Just picked up the truck today from the shop, turned out to be a defective spark plug. The mechanic said it wasn't carbon tracked or visibly bad but changing the plug out made the misfire go away and the MIL or misfire didn't come back and it was driven 50 miles and still good. Before the plug change I couldn't make it to the end of the driveway before the code would return and start running very rough now it runs smooth. I am relieved that all it was is spark plug. thanks for your feedback. John

thanks guys! I'll post when I find out something. John

Thanks for your response Snowcamo! John

Hello, Looking for direction on a 2017 Silverado with 5.3L gasoline engine that has only 18,500 miles on it. I am getting a P0305 (cylinder 5 misfire) I checked for spark on #5 cylinder plug wire (but didn't pull the plug itself) and got a good spark, the engine runs pretty rough under load and even the traction indicator comes on, I even cleared the code out but it comes back. I just dropped it off at a local repair shop in town and he can't get at it for a few days, Anyways he looked on Intellifix? and the consenus seems to be a camshaft issue is common. My question is, and I know anything is possible, but how likely would a camshaft failure be on a such a low mileage vehicle? As I undestand from the little research I have done is that cylinder 5 isn't a AFM cylinder. Thanks for your time and feedback! John