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      11-29-2018, 06:31 PM   #1
dainese
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Never Mind - sorry, wrong forum, please delete - N55 135i - pulling timing on boost

Hi guys.

My car was eventually diagnosed to have a faulty boost pressure sensor (pressure converter). This has allowed the boost pressure and target in sync now and has sharpened up the car down low and given a more linear/consistent power delivery. Very happy.

On advice I enabled the timing correction logging in MHD and much to my disappointment I am pulling timing randomly across a few cylinders. The timing gets pulled it appears as boost develops. I recently changed plugs, ungapped bosch zr-whatever-33 model numbers.

I think it was pulling timing before the plugs replacement but maybe not as extreme.

Stage 1 on lower octane map, BMS charge pipe

Any obvious clues? I swapped one coil pack over but didn't get a change and petrol stations too. Also changed to higher octane stage 1.

Logs:

before plugs: https://datazap.me/u/dainese01/log-1...20-21-22-24-25

I believe post plugs: https://datazap.me/u/dainese01/log-1...data=3-4-13-23

https://datazap.me/u/dainese01/log-1...data=3-4-13-23

https://datazap.me/u/dainese01/log-1...data=3-4-13-24

Car is driving great and I'm stoked with it otherwise. Hoping to make sure it's running well, before Stage 2.

Greetings from Australia.

Justin


Last edited by dainese; 11-29-2018 at 07:22 PM.. Reason: Never Mind - sorry, wrong forum, please delete
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      11-29-2018, 06:57 PM   #2
Divbetic
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Probably would be best to post in the n55 section. These guys with the 1m are n54.
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      11-29-2018, 07:20 PM   #3
dainese
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Whoops. Sorry
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