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Lean spike at shifts

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Old 06-10-2007, 08:19 PM
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Originally Posted by dewmanshu
I have new inline on the way.
Old 06-10-2007, 08:39 PM
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quiet as in it still goes lean, I think the pump took a poop.
Old 06-14-2007, 08:12 PM
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Originally Posted by dewmanshu
quiet as in it still goes lean, I think the pump took a poop.


WTF New inline, new wires to inline (old were burnt), pressure is at 65#'s. I have the VE table very very fat in these regions. I understand Dyn Cyl is out of whack and it's too rich. I wired in some narrowband o2's (old ones were dead) so I could actually see in comparison the lean spot and sure enough it's there. WTF (Still SD in this run)
Old 06-14-2007, 08:23 PM
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thats weird as hell.. is there something else that could control fuel at WOT like pe or boost ve? I have no clue when it comes to boosted applications but that just doesnt make sense..
Old 06-14-2007, 08:40 PM
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all i know is that you hit 88mph in that scan so i know your flux capacitor was fluxin'
Old 06-14-2007, 08:53 PM
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Originally Posted by Holty
all i know is that you hit 88mph in that scan so i know your flux capacitor was fluxin'
it did feel pretty fast. I pulled over on the highway and try to baby it back out withoout doing a burnt but not letting it shift, you can see in the beginning the tires spinning. I was sideways coming onto the highway.
Frame 10269 if the attachment works.
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Old 06-14-2007, 08:56 PM
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Originally Posted by ridnlow
thats weird as hell.. is there something else that could control fuel at WOT like pe or boost ve? I have no clue when it comes to boosted applications but that just doesnt make sense..
well the BE is playing the multiple to fueling, commanded at time is 11.77AFR though, it slowly goes lean as it "prepares" to shift. Prepare=200rpm before shift feeling.
Old 06-14-2007, 09:00 PM
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So its commanding the right AFR you just arent getting that.. same thing was happening to me but I had MAF and it was out of wack..
Old 06-14-2007, 10:00 PM
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If a cutoff of some sort was hit, wouldn't I see the injPW drop off? or would the pcm(scan) still show something? I just noticed in my tune that badVSS fuel cut off is 6000RPM and resume is 5800. But it is showing the injPW increasing through the shift.
Old 06-14-2007, 10:45 PM
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at this point it wouldn't hurt to try bumping that up a little to see what happens....


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