This is a question that i've seen asked a quite bit but never any resolve according to the forum search. After warm-up i'll shut off engine wait 1 min and try to start it back up and it cranks for way too long..but it will start eventually. I've replaced ALL sensors exept for 02 sensors...I've dumped codes and come up w/ nothing,this is very confusing!! Could the fuel return line cause this?? fuel pressure drops slowly when engine is off.