It drives well starts up go go, when i take my foot off gas pedal idle goes way down and dies

Question

Codes p0455, p1139, replace fuel pump it starts now low idle, then dies, replaced purge regulator nothing,still dies

Answer 1

P1139  Long trim fuel trim fuel rich

The engine is getting fuel more than it needs, the fuel pressure regulator pull the vacuum hose from it see if fuel is seeping into the vacuum hose, This engine not breathing right, airfilter not plugged, , The MAF sensor airduct boot from MAF to throttle body no rips or holes.