I have a code P1399 random misfire
Hello. A random misfire can be caused by many different things such as dirty fuel injectors (https://www.yourmechanic.com/services/fuel-injector-replacement), a weak fuel pump (https://www.yourmechanic.com/services/fuel-pump-replacement), a bad fuel pressure regulator (https://www.yourmechanic.com/services/fuel-pressure-regulator-replacement), fouled spark plugs (https://www.yourmechanic.com/services/spark-plugs-replacement) or wires (https://www.yourmechanic.com/services/ignition-cable-spark-plug-wires-replacement), a failing ignition coil (https://www.yourmechanic.com/services/ignition-coil-replacement)...
[Engine](/topics-engine-chevy/) idles at 2500 to 3000 after replace throttle position sensor Mechanic's Assistant: Does the vehicle hesitate during acceleration? Or maybe speed up suddenly when you aren't even hitting the ...
[Engine](/topics-engine-chevy/) idles at 2500 to 3000 after replace throttle position sensor Mechanic's Assistant: Does the vehicle hesitate during acceleration? Or maybe speed up suddenly when you aren't even hitting the gas? Just idles between 2500 and 3000 rpms Mechanic's Assistant: What is the make/model/year of your car? 2012 Chevy Silverado Mechanic's Assistant: Are you fixing your vehicle yourself? What have you tried so far? Cleaned throttle body and replaced TPS