Long Crank before starting , after walbro fuel pump install

[atx]

Just installed a Walbro fuel pump to my Silverado and it cranks long before start.
Any help on what the problem could be? Any tables I need to mess with?

Thanks , any feedback would help.

[5FDP]

Checked fuel pressure yet?

Maybe you have to prime it a few times or the regulator isnt working right.

[camONLYls1]

Some walbro pumps don't have internal check valves. So you're starting with zero fuel pressure every time you turn the engine over. You can install an aftermarket check valve right before the fuel rails if this is the case.

[seven ends]

Just installed a Walbro fuel pump to my Silverado and it cranks long before start.
Any help on what the problem could be? Any tables I need to mess with?

Thanks , any feedback would help.

I noticed that about my Walbro too. I added another second to my prime time under Fuel System > Fuel Pressure. The main thing to remember is turn the key on for the amount of prime time before you actually hit the starter.....makes the most difference. I also bought a check valve I am adding when I change to a hybrid return system in a couple of weeks.

[atx]

Increased prime time but still have the same problem.

[Lakegoat]

Turn the key to the "on" position, count to 3(sec), then start the engine. I have my prime set to 6 seconds and do the delay start thing. Don't get the check valve with the flapper valves. They just blow out and shut off the fuel flow.