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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Could someone please look at my log? LPFP problem maybe? Log inside!



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      06-19-2015, 03:49 AM   #1
mightbaal
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Could someone please look at my log? LPFP problem maybe? Log inside!

Ok so I am running 30% E85 and 70% 93 octane on a JB4 N54 (2008 BMW 335xi) and this is a WOT run for awhile but my LPFP numbers look like they are all over the place is this normal? Been having a problem with I think fuel pressure and my pump not keeping up as it sometimes hits a limp mode this run was to my limiter 0-135 mph if I remember correctly. Car has DCI and JB4 Map 5. 56k miles

http://www.datazap.me/u/mightbaal/lo...=1&data=1-4-17
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      06-19-2015, 07:49 AM   #2
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Upload the csv file
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      06-20-2015, 06:18 AM   #3
mightbaal
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Quote:
Originally Posted by csu87 View Post
Upload the csv file
This forum wont let me upload csv for some reason gotta use the link :/
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      06-22-2015, 11:15 AM   #4
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Your IAT is at 150 at the end; very, very high.

When logging, do a third gear pull from 2k to redline.

Post log here: http://www.n54tech.com/forums/forumdisplay.php?f=35
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      06-25-2015, 01:29 AM   #5
mightbaal
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Quote:
Originally Posted by bk335 View Post
Your IAT is at 150 at the end; very, very high.

When logging, do a third gear pull from 2k to redline.

Post log here: http://www.n54tech.com/forums/forumdisplay.php?f=35
Well its a stock intercooler and this is a 0-135 mph run so I would think that would rise a bit at the end esp.... right?
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      06-25-2015, 01:36 AM   #6
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Quote:
Originally Posted by mightbaal View Post
Ok so I am running 30% E85 and 70% 93 octane on a JB4 N54 (2008 BMW 335xi) and this is a WOT run for awhile but my LPFP numbers look like they are all over the place is this normal? Been having a problem with I think fuel pressure and my pump not keeping up as it sometimes hits a limp mode this run was to my limiter 0-135 mph if I remember correctly. Car has DCI and JB4 Map 5. 56k miles

http://www.datazap.me/u/mightbaal/lo...=1&data=1-4-17
The low pressure is going fluctuate up and down. It does look pretty strained with a few drops below 50. Your high pressure stays strong throughout at least. If you are going to keep running ethanol blends then I would certainly look at replacing it. I'd go with the Stage 2 kit from Fuel-it.
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