Plz explain Lean cruise.
02-07-2011, 03:07 PM
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Plz explain Lean cruise. What its this lean cruise mode tht i have read about? An how could I tell my tuner to do it. Using hpt . 04 a4 .
02-08-2011, 09:32 AM
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HP Tuner has a section in there for this.
From my understanding it works for going 30mph+ only. What it does is once over that speed and you hold a constant speed for 8sec, it will lean out using less fuel which betters your fuel economy. It's pretty much for highway situations.
Someone correct me if I'm wrong on this.
From my understanding it works for going 30mph+ only. What it does is once over that speed and you hold a constant speed for 8sec, it will lean out using less fuel which betters your fuel economy. It's pretty much for highway situations.
Someone correct me if I'm wrong on this.
02-08-2011, 11:36 AM
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You can set to come on at any speed or length of time. It works at light load, light throttle, as in cruising down the highway. Hence the name, lean cruise.
There are a few tables to play with to get it to work. Not too difficult to get it turned on. Easiest way to see what to do is look at a stock Holden file and use that as template.
There are a few tables to play with to get it to work. Not too difficult to get it turned on. Easiest way to see what to do is look at a stock Holden file and use that as template.
02-08-2011, 11:41 AM
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You can set to come on at any speed or length of time. It works at light load, light throttle, as in cruising down the highway. Hence the name, lean cruise.
There are a few tables to play with to get it to work. Not too difficult to get it turned on. Easiest way to see what to do is look at a stock Holden file and use that as template.
There are a few tables to play with to get it to work. Not too difficult to get it turned on. Easiest way to see what to do is look at a stock Holden file and use that as template.
normal fueling took over instantly.
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02-08-2011, 12:30 PM
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Im not a tuner, lol.
I just tinker with the program a little here and their, i leave all that to my tuner, i know enough about it to be able to look at what hes doing and somewhat understand it.
your tuner should be able to figure it out without issue.
sorry i couldnt be of further help. Im sure someone will chime in.
I just tinker with the program a little here and their, i leave all that to my tuner, i know enough about it to be able to look at what hes doing and somewhat understand it.
your tuner should be able to figure it out without issue.
sorry i couldnt be of further help. Im sure someone will chime in.
02-09-2011, 01:41 PM
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This shows some of the tables and their settings. To make it work right the air fuel ratio as well as some timing is adjusted. I get about 12% better mileage with it enabled. It's main benefit is driving on the freeway. It's one of the benefits of the '04 as it's the only year with it. Because they brought it over fairly quickly they left the Australian computer in the car and just zeroed out the tables. An engine can run very well under very lean conditions (greater than 16 to 1) with no harm to the engine. As soon as a load is placed on it (monitored thru MAPs) it reverts to normal. The reason we don't have it here on other cars is the EPA. Lean conditions use less fuel but make more NO emissions which are a concern for smog in some places but frankly out in the country don't mean squat.
02-09-2011, 07:06 PM
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This is a cool perk to the car. Iv had mine almost 3 yrs now and never knew anything about this. I will surely have this enabled next time i go out and get some tuning done.
