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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > negative timing in cylinder 4 & 5???



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      07-21-2020, 07:58 PM   #1
Jay92235
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Hello, i just put in a new valve cover gasket and oil filter housing gasket, as well as 2 degree colder NGK spark plugs and OEM coils, i took the car for a rip and noticed it was pulling timing in 4 & 5, i have the car tuned to mhd stage 2 w/ACN 91, i use shell 91 Oct in Alberta, Canada.
here is the log

https://datazap.me/u/jay-batke/negat...7-8-9-10-11-12

any response is greatly appreciated!
- Jay
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      07-21-2020, 11:41 PM   #2
Emilime75
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That log isn't very useful. Read up on what you should be logging, and how as far as gear, throttle, RPM...

Add LTFTs, boost target, WGDCs and low pressure fuel pressure.

I'm no ignition expert, but I didn't think 2 step colder plugs were needed for your level of mods.
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      07-21-2020, 11:43 PM   #3
Jay92235
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Quote:
Originally Posted by Emilime75 View Post
That log isn't very useful. Read up on what you should be logging, and how as far as gear, throttle, RPM...

Add LTFTs, boost target, WGDCs and low pressure fuel pressure.
Hey, sorry I'm new to the forums, I will do another log tonight and post the datazap.
Thank you
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      07-21-2020, 11:47 PM   #4
Emilime75
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Don't bother until you read up on it. Running it through the gears from 1st isn't what we need to see. For log analysis you want to start in third gear, about 40-50mph, traction control completely off, floor the throttle and take it up to redline, shift into 4th and floor the throttle again for a few seconds.
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      07-22-2020, 12:06 AM   #5
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Get into 3rd gear with rpms at 2500 and stomp on it, shift into 4th at 6500rpm.
No need to take it up to redline
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      07-22-2020, 12:12 AM   #6
Jay92235
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Quote:
Originally Posted by BM3Rrrr View Post
Get into 3rd gear with rpms at 2500 and stomp on it, shift into 4th at 6500rpm.
No need to take it up to redline
Ok will do, thank you!
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      07-22-2020, 01:18 AM   #7
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If you are unsure what parameters to log you can just use "default"

Have a look at this doc:

https://www.docdroid.net/file/downlo...talogs-pdf.pdf

Its very useful
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      07-22-2020, 03:36 PM   #8
Jay92235
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https://datazap.me/u/jay-batke/negat...og=0&data=3-21
heres the new log, i know i didnt put the pedal straight through the ground, i was skeptical due to still being on the stock chargepipe
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Cat less down pipes, 2 step colder spark plugs, MHD tune.
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      07-22-2020, 07:01 PM   #9
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I wouldn't worry about the chargepipe, though in your signature it says you have a Chargepipe with tial q?

Still need to be at full throttle to tell anything....though i can see your rail pressure taking a dive already

Adjust your logging parameters again....still alot of useless info on it.
Run the below as a minimum

time
accel ped pos%
boost psi
boost mean psi
boost target psi
cyl timing cor 1
cyl timing cor 2
cyl timing cor 3
cyl timing cor 4
cyl timing cor 5
cyl timing cor 6
Fuel low pressure sensor psi
iat c
lambda bank 1 afr
lambda bank 2 afr
load actual
rail pressure psi
rpm
stft 1%
stft 2%
throttle position
timing cyl. 1 crk
wgdc bank 1%
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      07-22-2020, 11:02 PM   #10
Jay92235
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I have the chargepipe, but not the blow off yet, for whatever reason it's taking a long time, ordered it late may. Anyways I'll do another pull today, and do you think she'll 91 should be ACN 91 or just 91 OCT on MHD? Let me know, thanks
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VRSF Catback exhaust, DCI, 5? stepped intercooler, Chargepipe w/tial q
Cat less down pipes, 2 step colder spark plugs, MHD tune.
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      07-23-2020, 12:31 AM   #11
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Quote:
Originally Posted by Jay92235 View Post
I have the chargepipe, but not the blow off yet, for whatever reason it's taking a long time, ordered it late may. Anyways I'll do another pull today, and do you think she'll 91 should be ACN 91 or just 91 OCT on MHD? Let me know, thanks
91 OCT

When you re-flash switch from V8 maps to V7.1, they seem to be a bit smother (in my case anyways)
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