Having a couple issues on my tune which are kind of frustrating and I can't seem to fix. First issue is that in closed loop idle the engine is running lean and surging. I can see the factory narrow band o2 reading extremely low which agrees with my wideband which has read up to 16.5 or so when the worst surging happens, however, the integrator and block learn are both indicating rich? Doesn't make much sense to me.
I've tried more fuel and less fuel, neither helped. Tried more timing and less timing, neither helped. Is there something I can do to get the integrator and block learn to agree with the actual mixture? I also seem to be having this same issue in the low kpa range when coasting at highway speeds, the faster I'm going the worse the lean/lean surge gets. I thought maybe exhaust leak introducing extra air so I used the powersmoker smoke machine at work (goes to around 30 psi) and there are no leaks. Just to be 100% sure I ran it in open loop and had the same issue.
The rest of the tuning has went pretty decent and I'm fairly happy with everything else, if I can get these 2 things squared away I'll be ready to do some WOT tuning. I attached a log as well as the bin, xdf, and adx I'm using below and am running a 7427 ecm with $0D mask. I would really appreciate some advice on this, I've been pulling my hair out on this one.
One last thing I will note is for whatever reason my AEM wideband displays a slightly different reading than what tunerpro reads when using the linear egr trick to display afr with the supplied formula, so if you don't use my adx file the afr reading displayed will likely be off. Still not really sure why that is but with my adx they match up fine so I haven't invested much time into looking into it. Idle issue is near end of log, several decel issues in log but good one at 215 seconds run time, thanks again for any help/pointers.
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