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Fuel enrichment BT0

 
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Asim R32GTR
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Joined: 25 Feb 2008
Posts: 54
Location: Oslo / Norway
PostPosted: Thu Jun 12, 2008 7:21 am    Post subject: Fuel enrichment BT0 Reply with quote
Hi

I currently have this value set to BT0=0 us/V
I think my problem with unstable AF values from day to day, or differente AF each time i start the car could be related to this value.

What do you guys have this set to? is there a common value that can be used? what happends if this is set to 0 us/V like i have?

Thanks

Asim
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TimZ
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Joined: 25 Feb 2008
Posts: 120
Location: Dearborn, Michigan
PostPosted: Thu Jun 12, 2008 11:49 am    Post subject: Re: Fuel enrichment BT0 Reply with quote
Asim R32GTR wrote:
I currently have this value set to BT0=0 us/V
I think my problem with unstable AF values from day to day, or differente AF each time i start the car could be related to this value.

What do you guys have this set to? is there a common value that can be used? what happends if this is set to 0 us/V like i have?


Mine is currently set to 150uS/V.

If you set it to zero, then you could tend to run lean when the system voltage is low - less energy to the injector means it doesn't open and close as quickly.
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Asim R32GTR
founding member


Joined: 25 Feb 2008
Posts: 54
Location: Oslo / Norway
PostPosted: Thu Jun 12, 2008 12:22 pm    Post subject: Re: Fuel enrichment BT0 Reply with quote
TimZ wrote:

Mine is currently set to 150uS/V.

If you set it to zero, then you could tend to run lean when the system voltage is low - less energy to the injector means it doesn't open and close as quickly.


Ok, i understand.... i will try different setting later today...

But if other people could share what number they use for this, it would be great Smile

Cheers
Asim
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Jon@EMI
EMI


Joined: 26 Feb 2008
Posts: 144
Location: Manassas, VA
PostPosted: Thu Jun 12, 2008 1:48 pm    Post subject: Reply with quote
Changing AFR from day to day might also be a Minimum on time that is a little too low. Try bumping that up by about 0.1. It may make idle a little rich(er), but it should make it a bit more repeatable.
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TimZ
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Joined: 25 Feb 2008
Posts: 120
Location: Dearborn, Michigan
PostPosted: Thu Jun 12, 2008 4:22 pm    Post subject: Reply with quote
Jon@EMI wrote:
Changing AFR from day to day might also be a Minimum on time that is a little too low. Try bumping that up by about 0.1. It may make idle a little rich(er), but it should make it a bit more repeatable.


Could also be MAT enrichment compensation (DE0) - if this isn't set/enabled, cooler air at night can cause a leaner mixture.
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Knowledge is not wisdom
Wisdom is not truth
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Asim R32GTR
founding member


Joined: 25 Feb 2008
Posts: 54
Location: Oslo / Norway
PostPosted: Thu Jun 12, 2008 7:40 pm    Post subject: Reply with quote
Jon@EMI wrote:
Changing AFR from day to day might also be a Minimum on time that is a little too low. Try bumping that up by about 0.1. It may make idle a little rich(er), but it should make it a bit more repeatable.


I have tried this, not much difference....


TimZ wrote:
Could also be MAT enrichment compensation (DE0) - if this isn't set/enabled, cooler air at night can cause a leaner mixture.


I have DE0 set to 3%, and its not this either... it does the same no matter what this value is..... still havent had time to try the BT0 set to 60us/v (recommended if i hit F1).....

Thanks
Asim
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