My Motors Leaning Out Any Ideas?

[silviline]

hey , i have a rb20det and i have found in this nice cold waether we are haveing at night wen i drive it through the rev range (up to 6000 rpm) its going to lean. i have found this happens in mainly 3rd gear. wen you change to 4th its fine. i have put a rb25 turbo on the motor. its in a silvia that still has the ca18det pump. any idea??? cheers

[R31Nismoid]

fuel pump is dying

[BezerkR32]

turn boost down or put a computer and fuel system to suit.

hey , i have a rb20det and i have found in this nice cold waether we are haveing at night wen i drive it through the rev range (up to 6000 rpm) its going to lean. i have found this happens in mainly 3rd gear. wen you change to 4th its fine. i have put a rb25 turbo on the motor. its in a silvia that still has the ca18det pump. any idea??? cheers

[silviline]

its running 10 psi would that make a difference? im putting a walbro pump in and adjustable reg soon. just strange how my old motor never had this problem,

[R31Nismoid]

adj fuel reg is most certainly NOT the answer

sounds like the pump isnt getting enough voltage, or its yet another walbro DUD

[Cubes]

When your old motor was in there the fuel pump was newer.. They don't last forever.

[salad]

well if your still using the stock CA pump... its by far not enough...