Re: LS1 Lean Cruise

[romans@starstream.net (Romans, Mark)]

I never heard it, just picked up by the knock sensor, 1-2 deg usually.
My hwy cruise mode is in for 60 seconds then out for 5 then back in.
----- Original Message -----
From: <rrauscher@nni.com>
To: <gmecm@diy-efi.org>
Sent: Wednesday, December 06, 2000 10:41 AM
Subject: Re: LS1 Lean Cruise


>
> When you say trace detonation, was it loud enough to
> be heard by the knock sensor? Or did you pick it up
> by plug reading?
>
> I have also been playing with hiway cruise modes. One
> thing I found was that it is important to drop out of
> hiway fuel mode on a regular basis. This allows the BLM
> to re-adjust as needed.
>
> Otherwise, at times I'd see O2 readings over 900mv. Not
> what was intended. I setup the code for 60 secs in hiway,
> then 7 seconds out of hiway, repeat as required.
>
> BobR.
>
> >In OZ GM May enable the lean cruise.  I don't believe your LS1's use EGR
in
>
> >OZ?
> >It's probably in the code, I don't know.  The 89 YB code has it, as does
the
>
> >90-92 FB &  YB
> >code, it is just not enabled.  I have heard that the EPA considered it an
> >emissions defeat devise
> >because it puts out more NOx.
> >I enabled it on my car, (89 YB) set it to go to 15.5 to 1 at cruise.
16.0
>
> >to 1 gave me a lean misfire.
> >I also had to disable hwy spark, it caused trace detonation at cruise.
> >With 3.45 gears and .5 6th gear, I can get between 28 and 31 mpg at 70
mph.
>
> >Mark
> >----- Original Message -----
> >From: "Ross Myers" <ponty@axis.jeack.com.au>
> >To: <gmecm@diy-efi.org>
> >Sent: Tuesday, December 05, 2000 10:45 PM
> >Subject: Re: LS1 Lean Cruise
> >
> >
> >>
> >>
> >> >Have run the LS1 a far bit on the dyno and it does not go into lean
> >cruise
> >> ,
> >> >it has very quick response to self learn when a blower is installed
but
> I
> >> >have never seen it leaner than 14.7 :1
> >>
> >>
> >> Thanks Daniel, just as the mag said, it never goes below 14.7:1 , but
with
>
> >> economy figures around the 13L/100Km (Sorry U.S folks) mark around town
> >who
> >> cares!!.
> >>
> >> Ross Myers
> >>
>
>> -------------------------------------------------------------------------
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>
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