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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 > Timing corrections and low boost MHD S2+



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      04-05-2024, 02:07 PM   #1
clee11262
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Timing corrections and low boost MHD S2+

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Running 93 Oct Canadian fuel on a 91 map, but im still hitting timing corrections and loost boost compared to MHD targets of 18psi. Anyone know what should be done?

Running CTS Downpipes + 5inch FMIC, DInan Coils and NGK plugs.
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      04-06-2024, 08:30 PM   #2
clee11262
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Even more timing corrections on esso 93 fuel with same map
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      04-13-2024, 01:13 AM   #3
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Is this a recent issue? Have you tried a lower-stage calibration file?
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      04-14-2024, 02:50 AM   #4
clee11262
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Quote:
Originally Posted by CalibratEd View Post
Is this a recent issue? Have you tried a lower-stage calibration file?
Yeah happening for a while, could never get it to pull with no timing corections even after new plugs + coils. Ill give a lower map a try, I threw a bottle of STP Oct Boost and it cleared up but my boost is still only around 14psi on Stage2+ map
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      04-15-2024, 11:03 PM   #5
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Have you checked for boost leaks?
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