Hello I have 87 n/a car would start rev up and bog out didn’t hear the fuel pump priming, put a walbro 255 pump in it car will start rev to 3k 3-4 times then bog out. If I push the afm flap I can hear the pump run and fuel going to the rails but still not prime when keys turned on

 

Car will stay running if I use the gas pedal but won’t idle

 

the stock ECU doesn't prime the pump