have a miss at 2200 rpms. When cold runs rough, occasionally backfires

If it only does it when cold, could be dirty or bad egr valve

Unplugged the egr valve when first started having problems, still had issues. Also, truck has started running rough even when it's warm

Are there any check engine codes, if not, Check the catalytic converter by unplugging the downtream 02 sensor, if it runs ok for a while, your catalytic converter is plugged up. If still missing, check fuel pressure, spark and timing

Checked everything but catalytic converter, will check and let you know. Thanks!