Misfire after replacing torque converter

You will need to start with the basics like scanning for codes. If this started right after a major repair like a torque converter you will want to go over anything that could have been damaged or not returned to its proper place. Look at injector plugs, spark plug wires etc Alex

I doubt this has to directly with a new torque converter. This type of issue can be diagnosed with a quality scan tool and hands on testing. If you want to get a second opinion use this like to find a shop near you. https://repairpal.com/repair-shops Alex