wont hold fuel pressure after shutdown

[dookie]

I installed a walbro 255 and ever since after shut down the fuel pressure goes away and when I restart the car it cranks forever. I double checked that the fuel pump pick up tube o-ring was sealing and replaced it just in case but still no luck. Any suggestions? What holds the fuel pressure in these cars? Fuel pump? Check valve? Thanks.

 

[gsxspeed98]

Which o-ring is it that you replaced? It there isn't a good seal between the metal of the car and fule pump unit there can be a loss of pressure.

 

[dookie]

I replaced the o-ring for the fuel supply pick up tube. The rubber seal for the tank looked fine.

 

[Nautica985]

did you ever get this problem resolved? I am having the same problem.

 

[dookie]

Fixed it by replacing the big seal for the pump assy. Also blew air through the fuel pump in case the check valve was stuck.