Ok so i have finally gotten a chance to load the new tune in and it still idles at like 2.3 ms injector pulse width. Which with the cax it should be down around that .8 mark like i have it set at right?
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Ok so i have finally gotten a chance to load the new tune in and it still idles at like 2.3 ms injector pulse width. Which with the cax it should be down around that .8 mark like i have it set at right?
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Did parameter B9021 show up in your tune...?
Yes its there set to .8. Tried cal flashing and full flashing just in case
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Other factors affect the pulse width like the airmass calculation from the VE table and injector data. See if reducing VE values affects PW.
00 Silverado Z71, LQ9 w/ LS3 heads, BTR cam, Whipple 2.9@8#, 4l80E
This thing still will not control afr at idle. I am completely lost on this thing. Any other thoughts? Heres the latest log. I will pm the latest tune if anyone needs to see it. LastCall yes the pulse width does change with the ve adjustment.rambler new idle.efi rambler new tune 12.ctz
Why don't you just post your latest tune file?Originally Posted by johnj
Latest tune is posted now
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I didn't see it posted.
00 Silverado Z71, LQ9 w/ LS3 heads, BTR cam, Whipple 2.9@8#, 4l80E
in post 35 it says rambler new tune 12.ctz That is it
I know the AFR at start up was in the 14's, but it was only there for a few seconds, and the IPW was the same at start up as it was when idling (about 2.15 MS). The IPW likely needs to be in the 1.6-1.8 range to get the 14.5 AFR. Look at table B4005, those values don't look right. I think they should be much lower. As a test, you can 0 out the table and see the effect on IPW at idle. Also, smooth out the VE table in the idle region (400-1200 rpm). .8 values look low, but blend them into the table so there are no huge peaks and valleys where you idle. That will prevent huge swings with MAP and RPM changes near the idle region.
What cam do you have?
Last edited by LastCall; August 10th, 2016 at 06:41 PM.
00 Silverado Z71, LQ9 w/ LS3 heads, BTR cam, Whipple 2.9@8#, 4l80E
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