s10 wont start unless i use starting fluid

[muddinredneck513]

I just got a 93 s10 4 cly 5 speed for a real good price. It has new wires plugs fuel filter injector. It will not start on its own unless I spray starting fluid in it but then it will fire rite up and run all day. Once I shut it off I have to spray it to start it again. I was thinking fuel pump but I thought if the pump was bad it wouldn't run once I got it started. Any ideas?

[fastford]

pump might not enough pressure to start it, check fuel pressure with gauge

[xplorer55]

my s10 did that... it was the fuel pressure regulator. i did the lines and the fuel pump and injections and mani fold gasket... and after all that it turned out to be the presure reg

[biggin69]

X2 on the pressure reg. It is bad causing the pressure to bleed off when the truck is not running. It should start without starting fluid if you crank it long enough.