carlos8

hi, my fuel pump went out in my ls vtec turbo,i replaced it with a new walbro 255lph, now at cold start the car stay in the 10's afr's till warm up. Nothing
was touch only change the pump.

p.s. The old one only say 255lph no brand.

Muckman

iTrader: (2)

Maybe your fuel pressure got bumped up with the new pump.

carlos8

the gauge read the same pressure but i have another gauge i going to switch them.

thanks

turbodano

Sometimes the return side needs tending to when you increase fuel flow. At idle is when the return side is returning the most fuel.

Charlie Moua

iTrader: (3)

get it retuned....

carlos8

thanks Turbodano, i will try to make the line a little more short.

carlos8

problem seems to be solved, changed the return line from stock to 5/16" idle
like before.

carlos8

change the fuel gauge and i see a bump of 2-3 psi at idle. But with the new return line idle fine.