Once the engine's up to temp it runs perfect. Just replaced fuel pump ( seized). Durametric shows no codes. Have to wait about 10 seconds to restart. Outside temp above freezing. Anyone got any ideas?
No direct solution, but a past experience might be helpful. Once found a coolant sensor on a car that began running terribly pegged at something like -30F in the Houston summer - open circuit. Fixed the connector and end of problem. Check the values on your sensors - one may be way out and not trip a code.
It only occurred until I refilled the fuel tank. Maybe there was water in the fuel? I also put some water remover in the next tank. Thanks for the advice James.