Rb25 Severely Overfueling

[wlspn]

As mentioned in a previous thread, since installing an RB25 in my R32 I have had huge over-fueling issues, at idle & all through rev range.

Was just able to use a scantool to look at live data & the main thing that I noticed was injector pulse is around 7ms at idle. Also noticed IACV & "alpha airflow" (anyone know what this is?) were both at 100%. Does anyone know roughly what these readings should be & what could cause them to max out, or what could cause such a large injector pulse?

Any help appreciated...

[paulr33]

maybe the AFM is mangled or damaged

the AFM voltage at idle should around 1.0v at idle and 0.5v at key ON

if the AFM is showing 5v at idle, the ECU will think the engine is on full load, which would make it stall and run like ass

so check that, you can also try starting the car with the AFM unplugged, it should run in failsafe mode, which means rev limit to 2500

but it should idle with an unplugged afm (i think)