samh_08
March 21st, 2015, 02:55 AM
Heres the situation:
Trims are all settled in and holding a -2% on both banks holding the engine at 3000 RPM = Sounds decent but still some subtle engine noise making it sound 'unclean'. Still holding the engine at 3000 RPM in the same session I activate BIDI controls (Gen III 1MB PCM) and start adding and subtracting fuel.
As soon as I start adding fuel, the RPM increases 300-450 with the same throttle input I was holding 3000 RPM and the engine sounds better.
This setup has brand new o2 sensors and no exhaust leaks (tested with EVAP smoker).
Am I missing something?
Trims are all settled in and holding a -2% on both banks holding the engine at 3000 RPM = Sounds decent but still some subtle engine noise making it sound 'unclean'. Still holding the engine at 3000 RPM in the same session I activate BIDI controls (Gen III 1MB PCM) and start adding and subtracting fuel.
As soon as I start adding fuel, the RPM increases 300-450 with the same throttle input I was holding 3000 RPM and the engine sounds better.
This setup has brand new o2 sensors and no exhaust leaks (tested with EVAP smoker).
Am I missing something?