Cruising air/fuel ration difference. bank 1 13.5-14; bank 2 14.6-15
#1
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I ran these logs on the way to work and back and did 1 or 2 pulls each way. Like I mentioned before I have this problem with the wideband sensor dying on bank 2 and it lasts a month or so because the tune is lean which kills it, but it runs lean cruising only. At WOT both banks stay at 11.25.
Is it normal to have a whole point (1.0) difference in AFR between bank 1 and 2 since bank 2 runs leaner inherently?
I do not get any codes on bank 1 for AFR so there is nothing physically wrong with bank 2 because it would occasionally trigger bank 1. The whole tune is lean. Someone please look at the logs.
This is on G37 Denso injectors.
http://www.filedropper.com/cipher5-16-20133-05-57pm
http://www.filedropper.com/cipher5-16-20136-24-47am
Is it normal to have a whole point (1.0) difference in AFR between bank 1 and 2 since bank 2 runs leaner inherently?
I do not get any codes on bank 1 for AFR so there is nothing physically wrong with bank 2 because it would occasionally trigger bank 1. The whole tune is lean. Someone please look at the logs.
This is on G37 Denso injectors.
http://www.filedropper.com/cipher5-16-20133-05-57pm
http://www.filedropper.com/cipher5-16-20136-24-47am
Last edited by Andrei; 05-17-2013 at 01:34 PM.
#2
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In part throttle / cruising both banks should be identical since the ECU does corrections. At WOT you should be around 12.5 with no more than 0.2 - 0.3 diff between banks (assuming n/a). 11.25 means you're bottoming out the reading since that's as low as the OEM sensors can read... probably pig rich. Your tune needs alot of work...
And why are you using VHR injectors on a DE? The latency is probably different and throwing the whole tune off in an unexpected way.. I'm guessing the ECU is giving up on corrections and basically in open loop (limp) mode.
And why are you using VHR injectors on a DE? The latency is probably different and throwing the whole tune off in an unexpected way.. I'm guessing the ECU is giving up on corrections and basically in open loop (limp) mode.
Last edited by djamps; 05-19-2013 at 11:23 AM.
#3
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In part throttle / cruising both banks should be identical since the ECU does corrections. At WOT you should be around 12.5 with no more than 0.2 - 0.3 diff between banks (assuming n/a). 11.25 means you're bottoming out the reading since that's as low as the OEM sensors can read... probably pig rich. Your tune needs alot of work...
And why are you using VHR injectors on a DE? The latency is probably different and throwing the whole tune off in an unexpected way.. I'm guessing the ECU is giving up on corrections and basically in open loop (limp) mode.
And why are you using VHR injectors on a DE? The latency is probably different and throwing the whole tune off in an unexpected way.. I'm guessing the ECU is giving up on corrections and basically in open loop (limp) mode.
I figured 11.25 was beyond the readings since it was not changing at all.
and yes this has been running open loop since the swap because bank 2 runs lean cruising and I do not know why. I already did everything possible to find out why. exhaust leak, intake leak, new valve covers...
#5
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I think the misfire is caused by carbon build up from running rich at WOT, I need to buy Osiris tuner and tune it properly on a dyno. I blew some Dexron III on top of the pistons and let it sit for an hour and ran some Seafoam before. Maybe it will fix it until I can tune it.
It could be caused by the head gaskets and that is no good because I am not digging out the heads to change them bc I have no time. I think the second gen VQ35DE will work with the first gen ECM for another swap, but I need an HR/VHR transmission for it.
Last edited by Andrei; 05-27-2013 at 07:01 AM.
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