No Device: HD/Delphi EFI Tuning Basics
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HD EFI Guru
Joined: Jan 2008
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Those lines are into EITMS being active so not sure how that affects what you pointed out, having said that, looking back up through the logs, there is an awful lot of what you describe there but only lasting about half a second (e.g. 7546-7553) ...are those also wrong?
I'll have another look at the rest of what you've pointed out over the weekend and hopefully others will join in with questions.
Have a good weekend
I'll have another look at the rest of what you've pointed out over the weekend and hopefully others will join in with questions.
Have a good weekend
So how does one know EITMS is active from the log Only. It shows pulse width never off and spark never off as far as I can see.
Road Warrior
Joined: Jun 2015
Posts: 1,325
Likes: 140
From: Edinburgh UK
For me watching the gauges I've seen the O2 voltage drop to a dead 0v and Front CLI jump to 118, and that I have it set to kick in at 143*c.
But ye, I thought it was supposed to cut the fuel to the rear??
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HD EFI Guru
Joined: Jan 2008
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As you learn to start looking at the data I can direct you to how you might better tune, but you have to do it by hand with what you are using. Now I hope the things I've tried to get you to look at, begin to make sense. Knowing what sensors can and cannot do, helps understand the data your looking at. When you identify something out of place you need to try and figure out what's causing it. You all have already helped locate a few areas of concern with the data itself but who knows what we will find as you dig into it all.
Road Warrior
Joined: Jun 2015
Posts: 1,325
Likes: 140
From: Edinburgh UK
great point
Road Warrior
Joined: Jun 2015
Posts: 1,325
Likes: 140
From: Edinburgh UK
We've not done timing yet but PM would be good if you see anything, we can always come back to it later.
Stellar HDF Member
Joined: Mar 2012
Posts: 2,022
Likes: 599
From: Columbus, OH
Look at the O2 voltage 524 - 528 then again at 532 - 534
Look at Integrator and Adaptive at 529, 530. Note how one is trying to Remove VE and the other Add VE at the same time.
Look at 13455 Front Integrator and Adaptive are both trying to reduce VE but Front O2 shows 0.06 volts which is dead lean!
13455 - 13485 Front O2 shows dead lean the whole time, that's over 2 seconds! Look at what the Integrator tries to do.
Now do you think averaging or using these data frames just might screw things up when tuning? You have to look at the data then get rid of the bad data First, then try tuning it.
Look at Integrator and Adaptive at 529, 530. Note how one is trying to Remove VE and the other Add VE at the same time.
Look at 13455 Front Integrator and Adaptive are both trying to reduce VE but Front O2 shows 0.06 volts which is dead lean!
13455 - 13485 Front O2 shows dead lean the whole time, that's over 2 seconds! Look at what the Integrator tries to do.
Now do you think averaging or using these data frames just might screw things up when tuning? You have to look at the data then get rid of the bad data First, then try tuning it.
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Road Warrior
Joined: Mar 2013
Posts: 1,923
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From: Alorton, Illinois
Boils down to an indication problem or an actual problem. I thinks it's good to identify the problem in the first place. Quickest, cheapest, easiest thing to do is look at other channels of the data. Is it all telling the same story? Then I start to look else where.
Road Warrior
Joined: Jun 2015
Posts: 1,325
Likes: 140
From: Edinburgh UK
Just for some background, those VE are Auto tuned and Mytuned and any subsequent tuning effort only moves them around by one or two depending on the weather and if there is a full moon.
What I can say is that my observations of CLI are anything up to +-10% at low revs/load pulling in to better than +-5% higher up.
So the above (edit) data log with dodgy data as example?? ...normal, bad, very bad, or maybe just what that particular black box said at the time and something to be ignored?
What I can say is that my observations of CLI are anything up to +-10% at low revs/load pulling in to better than +-5% higher up.
So the above (edit) data log with dodgy data as example?? ...normal, bad, very bad, or maybe just what that particular black box said at the time and something to be ignored?
Last edited by Gordon61; Aug 11, 2016 at 10:55 AM.