[Rich at idle and stumbles while accelerating]

Here are my specs:

1973 240z

l24 engine

N47 head

MS2 2.88 (DIY Autotune)

Relay Board

NB O2 sensor (GM)

Bosch High imp. red top 30lb injectors (Ford)

Custom Intake manifold (Similar to Lonewolf)

T3 turbo (Borg Warner) Compressor A/R? Turbine A/R 50 stage 1)

Type 6 BOV

65mm throttle body (Ford)

Crane xr700 (Megasquirt controlled)

 

Just converted my 240z to FI and turbocharged. This is the second time that I tried tuning and have a few issues.

Engine runs rich at idle and cannot bring the idle rpm down. The fuel pump pressure is set at 42lbs. The narrow band GM O2 sensor reads above .80v most of the time and occasionally drops to .2v

Stumbles while accelerating. Would this be because of the acceleration bins

not set correctly? Data log file shows small increases in acceleration shots that seems to have odd correlations with RPM ramps.

240z turbo.zip

[ld28 intake manifold/plenum]

The clearence between the intake of the throttle body and the distributor seems to close for a smooth transition duct to fit in. The gap is about 2".