no fuel????

I recently installed a walbro 190 fuel pump, but then the car wouldn't start it just cranked but no fuel was being sent to fuel lines. I followed the directions on vfaq step by step, but yet i got no fuel. I double checked all the connections, but nothing worked, so I decided to put my stock pump back in, but even with my stock pump back in my car wont start, it just cranks. What the heck is wrong with my car?????

Test the pump connector for power when the motor is cranking.

how would i do that?

You said you installed the pump, so I am assuming you know where the electrical connector is. Put a meter on it and see if its getting a voltage applied while cranking. If not, you may have blown something out. If it is, you can look further into the pump itself. If its coming on, but you arent getting fuel, its definitely a bollixed install.