This sounds like a misfire that is firing back through the intake. This could be a burnt valve but if you are saying that when you unplug a sensor it stops, it may be the PCM causing it. However, we need to get more detail about what the sensor that you are unplugging is. Can you take a picture of it and send it over so I can try to identify it?
Also, check and see if there are codes in the computer because that will help point us in the right direction.
Saturday, June 22nd, 2019 AT 9:39 AM