Fw: Rich in closed loop idle (3rd post)

[JN]

----- Original Message -----
From: "JN" <jwn at sgi.net>
To: <gmecm at diy-efi.org>
Sent: Wednesday, August 16, 2000 7:53 AM
Subject: Fw: Rich in closed loop idle


>
> ----- Original Message -----
> From: "JN" <jwn at sgi.net>
> To: <gmecm at diy-efi.org>
> Sent: Tuesday, August 15, 2000 3:08 PM
> Subject: Rich in closed loop idle
>
>
> > Question for the experts.  89 Vette 7165 ECM (MAF)
> >
> > Say you are rich in closed loop idle.  How do you know if O2 is cold?
Say
> > car has a mild cam with more duration than a stock cam and runs 50 psi
> fuel
> > pressure.  At idle in closed loop, the car puffs some black smoke and
> > "sounds" rich since its lumpier than usual.  Exhaust smells strong like
> > excess fuel.
> >
> > What table is modified to reduce the amount of fuel at open loop idle?
Is
> > it the Open Loop AFR %Change vs. Temp?  If not what table is it?
> >
> > Thanks,
> >
> > Jason Norris
> >
>
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