Could I please get some opinions on these logs/tune? Erratic boost control and fuel issues

suspect

Specialist
Nov 7, 2023
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I have been working with a tuner to get a map sorted for my car. Currently we are on 23rd iteration (have not tried his 24th iteration yet). I would like to get a second opinion please. There are plenty more logs but these are some:

This contains the 1st (base), 2nd and 6th iteration:

5th and 7th iteration:

12th iteration:

19th iteration:

23rd iteration with 2 slots: Low power and high power

Hybrid turbos
2" inlets
Catless downpipes
Colder 97506 spark plugs (tuner's suggestion)
Walbro 450
5.5" FMIC

Car had thrown 30FC (boost leak tightness) code in some of the iterations and I was told to do a boost leak and vacuum test which found no leaks. Tuner thinks the boost control issues might be hardware related but it is getting better however not sure how else to find what hardware issue is causing this. He says my particular car interprets load differently. Car has also been getting fuel pump plausibility error on some iterations before and after walbro 450 install. I have not selected the MHD "stop oscillating AFRs at idle" option yet and I think my AFRs are oscillating a bit at idle in a double helix shape (not properly confirmed yet) like they would when a diagnostic routine is running, will this option help at WOT?
 
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carabuser

Captain
Vendor
Oct 2, 2019
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Doesn't look hardware related to me. The PID isn't working properly and the car is overboosting causing throttle closures. Looks like tuner error.

The MHD AFR oscillation toggle will prevent it in some cars, but there's various different adjustments depending on the exact cause. That only ever happens in idle and cruise conditions, not WOT. Pretty much all diagnostics are inhibited during WOT.

The 2AAF code is triggered by the EKP and the DME just passes the message across. If you want to fix that error you need to raise the current limits in the EKP.
 
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suspect

Specialist
Nov 7, 2023
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Doesn't look hardware related to me. The PID isn't working properly and the car is overboosting causing throttle closures. Looks like tuner error.

The MHD AFR oscillation toggle will prevent it in some cars, but there's various different adjustments depending on the exact cause. That only ever happens in idle and cruise conditions, not WOT. Pretty much all diagnostics are inhibited during WOT.

The 2AAF code is triggered by the EKP and the DME just passes the message across. If you want to fix that error you need to raise the current limits in the EKP.
Do you think this is bad boost control and overboosting is dangerous for the engine?
 

carabuser

Captain
Vendor
Oct 2, 2019
1,060
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1,210
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UK
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Z4 35i & 335i
Not dangerous at all. Just not a finished map, you'd essentially be better off just using the MHD OTS maps since they will have exactly the same issues on larger turbos.
 
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