have a miss at 2200 rpms. When cold runs rough, occasionally backfires
Overhauled the tpi, new distributor, new plugs, new wires, new cap new rotor button, new computer, new fuel pump, new coil, new thermostat, Truck is not throwing a code
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!
Looking for a Used C/K 3500 in your area?
CarGurus has 232 nationwide C/K 3500 listings starting at $2,500.
Search Chevrolet C/K 3500 Questions
Chevrolet C/K 3500 Experts