My van starts fine when cold, but, = floods and doesn't start when warm. But if you turn off the fuel pump it starts and = runs for a minute.Using the shotgun approach to troubleshooting ( also known = as swap 'till you drop) I've replaced the fuel pressure regulator, all the temp = sensors, O2 sensor, cleaned and reseated all connections. Now my question is what = else, besides the brain, controls the mixture? Any other ideas?