ECMlink Afrest leaner than wideband with large spikes at cruise

[OwenRonn]

My Afrest is way off from my wideband and it shows around 18afr at idle while the wibeband shows around 14. the afrest also has seemingliy random large spikes at cruise. I dont think it is related to the map sensor because i just installed a new aem3.5. Is it something related to my VE table? I have more logs if needed to narrow down the problem.

 

[We're on Boost]

The thing that sticks out to me in the log is the Combined Fuel Trim which is way too much negative. It's like 27% negative. So closed loop is pulling a lot of fuel out. That means the ecu thinks it would be way too rich without the 27% correction downward.
That is from 16.9 sec to the end. Before 24.7 sec the wideband is still sleeping, so the wideband numbers you see there are fake, but after 24.7 sec the wideband is awake and giving you numbers that are probably true.

Anyway, looking for why it would be too rich without the fuel trims:
Your VE in there is only ~59% which should be ok.
Your Global Fuel is actually a couple % leaner than mine with the same injectors, so I don't think that is too rich.
Your injBatteryAdj numbers at 12 and 14 volts look just like the numbers on the FIC test sheet that I've seen for those injectors, so that's probably ok. But then you are adding deadtime to those numbers with Global Deadtime of 300 microseconds.
So I'd try changing that 300 number to 0. Shouldn't need anything there. The InjBatteryAdj numbers should be enough all by themselves.
I'd try that and see if it helps.
Also, put CrankingFuelAdj in your logs.
And, there is only idle in this log, no cruise.

 

[OwenRonn]

I just got a log where I tried idling on 0 deadtime and I have a log where I drove it home from where I was working on the car. Do you think it could be a boost/exhaust leak.

 

[OwenRonn]

I just got a log where I tried idling on 0 deadtime and I have a log where I drove it home from where I was working on the car.

This is the cruise log i had it locked in open loop because it seemed to be running better and i needed to get home

 

[We're on Boost]

The log from post #3:
Ok, now the combined fuel trim is adding fuel (16.8%) instead of subtracting, and LC2 has swapped places with AFRatioEst. And the FrontO2 is not even cycling. And the 16.8% added by the fuel trim is not even doing enough. So it looks like we overshot by going from 300 to 0.

You should try setting Global Deadtime to about 180.

With an 850 rpm target idle, it will probably be pretty sensitive to deadtime. If it turns out to be too sensitive, then raising the target idle to like 1000 rpm should make it easier. My car with these same injectors has a target idle of 1100 rpm. Part of that is cams though. I don't see anything about cams on your car. Are they stock cams?

I don't understand why the MAP number came up in a hump at 15.7 secs, and then back down. Throttle didn't move at all. That could be a leak somewhere. But then it went away? Don't know.

Your cranking fuel adjust is working - that's good.

 

[We're on Boost]

The log from post #4 (locked in open loop)(with Global Deadtime at 300 again):
At 933 seconds in 4th gear with load factor around 1, your LC2 says AFR is about 11.7 which is pretty rich there. Your VE table has numbers that are quite a bit high in that area. So that one I would put down to the VE table.

Otherwise in the last log your LC2 AFRs look good (in the low 14's usually) whenever you are cruising along in 2nd or 3rd with light throttle, and they look way too rich (~11) whenever you are idling. The too rich at idle would come down to the Global Deadtime again.

I'd say try setting Global Deadtime to about 180, turn off the lock in open loop, then do another drive. If the idle seems sketchy, turn up your target idle to 1000 rpm but still with about 180 Global Deadtime. The idea would be to run a whole driving log like this with fuel trims working. Need closed loop to get fuel trims. With a log like that, you can run a SD VE Adjust (Combined Fuel Trims) to get a better idea how far off the VE map is.

 

[We're on Boost]

Is your VE map supposed to be good for the Evo 3 intake manifold?
If there is no particular reason for it, you'll probably start off better with the "stock" Speed Density map that is in the "Stock V3 ECU Config data files". If or when you want to try that, here's the file for stock 2g:

 

[OwenRonn]

I set deadtime to 180 and ran another log today and both idle and cruise seem to be much closer to stoich i am still seeing some funny behavior from wb and afr with lean spikes so maybe that could be a leak. I am wondering if I should drop in the stock ve map or tried to adjust the one i have with sd ve adjust. Also i am running stock cams.