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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > Cylinder Correction/Timing scaring me



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      05-30-2018, 01:36 AM   #1
TheGoodTheBadTheUgly
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Cylinder Correction/Timing scaring me

MHD Stage 1, ACN 91 101100 Km on my car.

Well, it is quite simple. Today I went and logged the car three times and I have noticed that I have a lot of Cylinder correction. I am a bit scared and I am wondering if it is normal. I never had any misfire and don't want to have one . I am trying to prevent one from happening.

Should change spark plugs and coil packs?

Could this much correction also be caused by the fact that we have trash fuel up here in Canada?

Thanks for the help.

https://datazap.me/u/thegoodthebadth...econd-log-1h09
https://datazap.me/u/thegoodthebadth...third-log-1h13
https://datazap.me/u/thegoodthebadth...ourth-log-1h18 (DTC OFF)

Last edited by TheGoodTheBadTheUgly; 05-30-2018 at 02:15 AM..
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      05-30-2018, 08:39 AM   #2
Pladi
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dude your corrections are not bad at all dont worry.. no issues. Better fuel would help but even stock bmw pull timing.. doesnt look bad. Yes its probably due to bad fuel. no worries bud.
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      05-30-2018, 10:47 AM   #3
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Quote:
Originally Posted by TheGoodTheBadTheUgly View Post
MHD Stage 1, ACN 91 101100 Km on my car.

Well, it is quite simple. Today I went and logged the car three times and I have noticed that I have a lot of Cylinder correction. I am a bit scared and I am wondering if it is normal. I never had any misfire and don't want to have one . I am trying to prevent one from happening.

Should change spark plugs and coil packs?

Could this much correction also be caused by the fact that we have trash fuel up here in Canada?

Thanks for the help.

https://datazap.me/u/thegoodthebadth...econd-log-1h09
https://datazap.me/u/thegoodthebadth...third-log-1h13
https://datazap.me/u/thegoodthebadth...ourth-log-1h18 (DTC OFF)
Timing corrections appear to be within what many here would consider normal. Did you just recently flash the map onto the car? It looks like you're getting some throttle closure after shifting when the car gets back into boost. Typically for a few days after a flash my car will do the same thing (and have more timing corrections than normal) but after it adapts a bit, it will get significantly better.

Try resetting adaptations if you haven't already and do another log or two after a few days of driving
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      05-30-2018, 01:11 PM   #4
TheGoodTheBadTheUgly
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Quote:
Originally Posted by SnapCoupe View Post
Timing corrections appear to be within what many here would consider normal. Did you just recently flash the map onto the car? It looks like you're getting some throttle closure after shifting when the car gets back into boost. Typically for a few days after a flash my car will do the same thing (and have more timing corrections than normal) but after it adapts a bit, it will get significantly better.

Try resetting adaptations if you haven't already and do another log or two after a few days of driving
What would you consider throttle closure, like bellow what threshold?

And I flashed April 21
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      05-30-2018, 03:36 PM   #5
chowabunga
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Ya canada angers me, fuel pumps are crap, e85 so expensive
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      05-30-2018, 03:51 PM   #6
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Quote:
Originally Posted by TheGoodTheBadTheUgly View Post
What would you consider throttle closure, like bellow what threshold?

And I flashed April 21
Look at where the car hits peak boost and you'll see that the throttle closes up a bit with all that boost pressure coming through. When the throttle spikes downwards like that the throttle itself is closing up to prevent from overboosting the engine. Typically you want your throttle to be a upwards transition that closely resembles your pedal position. Here is an example of a log with no throttle closure: https://datazap.me/u/geirsenk/stage-...21-22-23-24-25
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      05-30-2018, 06:43 PM   #7
TheGoodTheBadTheUgly
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Quote:
Originally Posted by SnapCoupe View Post
Look at where the car hits peak boost and you'll see that the throttle closes up a bit with all that boost pressure coming through. When the throttle spikes downwards like that the throttle itself is closing up to prevent from overboosting the engine. Typically you want your throttle to be a upwards transition that closely resembles your pedal position. Here is an example of a log with no throttle closure: https://datazap.me/u/geirsenk/stage-...21-22-23-24-25
I see your throttle position is constant and pretty much synced with the acceleration pedal position. Ok ill look into it in the coming weeks.
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