Need help

I recently put a new head gasket on my 95 Tacoma 2.7.got it all back together and now won’t start. It will start if I spray starting fluid in the tube going to the throttle body.it takes a good 6 seconds of spray and then it will start and idle and run like a new truck. Once it starts and warms up I can turn it off and it will start right up. So I thought it was losing fuel pressure. I have replaced plugs,wires,distrabuter,fuel pump,fuel filter, also cleaned out the throttle body and the fuel pressure regulater ,and new battery.....any other ideas?

 

At any time did it trip any codes ??