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afr confusion

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Old 03-10-2008, 05:47 AM
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You want around 12.5ish at WO so you are close. However it sounds like someone just changed your PE values and never actually tuned it like it should have been.

But I cant see the tune so what do I know.
Old 03-10-2008, 08:30 AM
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Originally Posted by phasemaster1
ok when im in idle i get 14.6. then while cruising i see 14.3-14.7 even under 1/2 to 3/4 throttle pulling good it stays in same area, its only when 100% throttle that i see 12.3.
There are a couple of conditions that have to be met in order to go into PE... You have a MAP threshold, RPM Threshold, TPS vs RPM threshold, etc... What tuning software to you use?
Old 03-10-2008, 05:46 PM
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Originally Posted by BlackGMC
There are a couple of conditions that have to be met in order to go into PE... You have a MAP threshold, RPM Threshold, TPS vs RPM threshold, etc... What tuning software to you use?
Ya what do you use, post up a copy of the tune if you want so it can be looked at.
Old 03-10-2008, 05:59 PM
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Originally Posted by 03sierraslt
Ya what do you use, post up a copy of the tune if you want so it can be looked at.
I use EFI Live, I will post up a copy when I get home, but I am using COS3 so I don't use the PE table at all or any of the enablers...
Old 03-10-2008, 06:45 PM
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Originally Posted by BlackGMC
I use EFI Live, I will post up a copy when I get home, but I am using COS3 so I don't use the PE table at all or any of the enablers...
I didnt mean you... haha. I have Hpt, Not sure what COS3 is. I am 2bar OLSD.
Old 03-10-2008, 08:43 PM
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sorry guys i will have to post tune tomorrow my central ac went out and have been installing a new one. wife is pregnant...nothing worse than a pregnant woman with no ac.
Old 03-10-2008, 09:42 PM
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Originally Posted by 03sierraslt
I didnt mean you... haha. I have Hpt, Not sure what COS3 is. I am 2bar OLSD.
Sorry, you did quote me, I assumed you were talking to me...
Old 03-11-2008, 05:17 AM
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Originally Posted by BlackGMC
Sorry, you did quote me, I assumed you were talking to me...
Ya I guess so, I was more less quoting you because I agreed with you and wanted to see how his was setup.
Old 03-11-2008, 08:53 PM
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Originally Posted by 03sierraslt
You want around 12.5ish at WO so you are close. However it sounds like someone just changed your PE values and never actually tuned it like it should have been.

But I cant see the tune so what do I know.
I use HPT here is a copy of my tune...
Attached Files
File Type: hpt
august507misfirebackidle.hpt (493.4 KB, 74 views)
Old 03-12-2008, 08:46 PM
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I would lower your PE settings. Engine-Fuel Control-Power Enrich I would set Delay RPM to 0. Enable to to 0. I would also set your enrichment rate to 4.0

Judging by your VE table it appears as though its compensating for a Incorrect MAF table. You have a very large jump at 3600rpm, it should not be that durastic of a change.

Your timing table also has some absurd jumps in it..... Pull up your timing table and look at it in the 3D chart view and youll see what I mean.


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