question about fuel pressure

89Stang5.0 · 08-09-2003

I have in my car a hiflow pump witht the stock regulator. its a 255 made by walbro. The engine only has 3000 miles on it since its rebuild. I am using the 6al box and 19# stock injector with stock intake. I was woundering if this had anything to do with my car running rich and using lots of gas. Can this have anything to do with it?? Any suggestions on how to fix??

Sargin · 08-09-2003

More air

vfast1 · 08-10-2003

yeah the pump is wayyyyyyyyy to big..all you need was a 155 at best what is the fuel pressure set at?..if you can't tell buy a adjustable fuel reg..this will help a lil

NoSlow5oh · 08-10-2003

You can run a 255lph on a bone stock motor with no problems. Thats what the regulator does, send the unused fuel back to the tank and regulate the pressure. Unless you have the walbro GSS340 high pressure pump it should not be your pump or regulator. I would run the codes to see if a sensor has gone bad first.