I recently bought a 2016 Chevy Tahoe PPV with the 5.3 engine. When I bought the vehicle I noticed a rough idle and misfire. When I first hooked up the code reader it read P0305. So I changed plugs and wires and no change. Next I changed coil pack and still no change except now it reads for multiple misfire. I bought a fuel injector to change that but haven't done it yet. I'm not sure what else to do what else it could be if the fuel injector doesn't fix the issue. Please help
I'm not sure what else to do what else it could be if the fuel injector doesn't fix the issue.
It could be anything that affects combustion. Vacuum leaks would be a prime suspect but it could even be bad compression. Live data may provide some clues, like crazy fuel trims.
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now it reads for multiple misfire.
Use a diagnostic tool to get misfire counts for all cylinders
