What is Lean cruise?
Thread Starter
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iTrader: (15)
Joined: Jul 2002
Posts: 1,441
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From: Shelby Twp. Mich
What is Lean cruise? Is it what it sounds like or am I not even in the Ball Park?Is it a way to make more efficiant on fuel for a trip(better gas miliage)? 
If so how do I use it?
Thanks,Scott
If so how do I use it?Thanks,Scott
To use it: move offshore 
The EPA sez it's just too naughty, so it's disabled in
domestic PCMs and HPTuners are not going to fight
city hall (but they're Aussies, some of 'em, so they
at least know about it down there).
Me, I'd rather have another 5MPG than a baby seal
with pink lungs. But I'm antisocial.
The EPA sez it's just too naughty, so it's disabled in
domestic PCMs and HPTuners are not going to fight
city hall (but they're Aussies, some of 'em, so they
at least know about it down there).
Me, I'd rather have another 5MPG than a baby seal
with pink lungs. But I'm antisocial.
TECH Senior Member
Joined: Nov 2001
Posts: 7,036
Likes: 1
From: Lake Zurich, IL
hmmm... so if the thresholds are modified will it activate or I wonder if there's an actual on/off bit somewhere that needs to be set?
Anyone have some mappings for holdens? (as far as timing changes and fuel changes for the F/A Subtrctor vs RM vs Cyl Air, and Multi vs ECT and Leanout Rate)
Anyone have some mappings for holdens? (as far as timing changes and fuel changes for the F/A Subtrctor vs RM vs Cyl Air, and Multi vs ECT and Leanout Rate)
I got some Holden maps but when I applied them
they did nothing. According to HPTuners it's
disabled at the OS level and messing the data
around, though you can do it, won't have effect.
Maybe somebody with the "Pro" version could
do a little sideline business here, opening up
Lean Cruise and any other "forbidden fruit" on a
mail-in basis... ??? I have a spare I'd pay some
reasonable fee, to get worked over that way.
they did nothing. According to HPTuners it's
disabled at the OS level and messing the data
around, though you can do it, won't have effect.
Maybe somebody with the "Pro" version could
do a little sideline business here, opening up
Lean Cruise and any other "forbidden fruit" on a
mail-in basis... ??? I have a spare I'd pay some
reasonable fee, to get worked over that way.
can i get a little more info on the benefits of this modification, and what the bad part of it, that the EPA does not like.
and are there any offshore files from 1998 pcm that are compatible, to get the code from? or is it something that is only a forbiden option on the 1999+ computers. 
Ryan
and are there any offshore files from 1998 pcm that are compatible, to get the code from?
or is it something that is only a forbiden option on the 1999+ computers. Ryan
I believe it's probably elevated NOx from running
leaner than stoich. That, or they just didn't jump
the hoops necessary to satisfy the EPA weenies
and make that mode "legit".
leaner than stoich. That, or they just didn't jump
the hoops necessary to satisfy the EPA weenies
and make that mode "legit".
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FormerVendor
Joined: Jan 2003
Posts: 525
Likes: 0
From: Melbourne, Australia
Originally Posted by jimmyblue
Maybe somebody with the "Pro" version could
do a little sideline business here, opening up
Lean Cruise and any other "forbidden fruit" on a
mail-in basis... ??? I have a spare I'd pay some
reasonable fee, to get worked over that way.
do a little sideline business here, opening up
Lean Cruise and any other "forbidden fruit" on a
mail-in basis... ??? I have a spare I'd pay some
reasonable fee, to get worked over that way.
Originally Posted by gameover
You don't need the Pro version, it's in the cal so Std will do it. Trouble is it changes the operation of a lot more things than just lean cruise, i don't know the exact name but it's more like a "vehicle class option" selector. ie. it's not just a Lean Cruise on/off flag.
and thresholds, and went driving in the regions where
it's supposed to work, and never got a Fuel/Air multiplier
below 1.0. I was told somewhere else that it was disabled
"more deeply" in US vehicle PCMs.