5.3 shorting out knock sensors
05-27-2012, 10:15 PM
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5.3 shorting out knock sensors Let me start by first off I replaced plugs, wires, and washed the motor. I then took about a 240 mile trip and got a engine light. It turned out to be the #2 knock sensor. It was rusted and had 195k on it. I replaced it and it lasted a week. So I replaced it and also replaced the harness. Now two weeks later its got the code for the same thing and its running like a dog again. Btw after it throws a code for about 2 days it starts running rough. It even has a miss at idle. You can watch the motor have a jerk type motion at idles and you can feel it at highway speeds. Please help
06-05-2012, 12:12 AM
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I forgot the code but it said low imput knock sensor 2.... I swapped the harness around. I plugged the front to the rear and vice versa. I also had the battery disconnected long enough it reset the system. Its running fine for know. It shouldnt be long though before it jacks up again.
