1227165 Tuning Advice

[Bruce Wilcox (EUS)]

Hi Dave,

How can I tell if the CAL ignores the BLM at WOT (I have the BIN file)???
Since the BLM is low (110, rich) in closed loop, maybe the engine is lean at
WOT (no extra fuel compensation)???

Best Regards,

Bruce

> -----Original Message-----
> From:	David A. Cooley [SMTP:n5xmt at bellsouth.net]
> Sent:	Thursday, April 22, 1999 11:58 AM
> To:	gmecm at efi332.eng.ohio-state.edu
> Subject:	Re: 1227165 Tuning Advice 
> 
> >Why does fuel pressure make a ton of difference at WOT? The ecm should
> >learn a correction for pressure while in closed loop that is applies to
> >the open loop WOT. Changing fuel pressure would allow injects to flow
> >more if needed, but the ecm should, over time, learn the correction
> >factor for the pressure being used. yes?
> 
> 
> Depends on the cal...
> some cal's ignore BLM offsets when they go WOT, and others only richen the
> mixture at WOT if it's showing lean at idle/cruise, and ignore the BLM's
> if
> it shows rich at idle/cruise.